Coke is terrible for you, a waste of money, and yes it is addictive and many people do get addicted but I wouldn't stress about it just yet.
So you bought a larger amount that usual, and allowed yourself a few indulgences in the daytime but didn't go overboard.
Just be aware of the addictive nature of it (which you are) and if you're
not addicted, and are capable of holding onto it for a while - don't do any tomorrow, and space it out over special occasions.
Sure it's possible to use cocaine responsibly. It's possible to use any drug responsibly - although for sure, some drugs are harder to use responsibly than others. But it's my personal opinion - which may be backed up by fact that I can't be bothered to look up right now that - that lifestyle, individual psychology, genetics, and other factors play a far larger role in one's tendency to develop problem usage habits. Genetics you can't do anything about but the first 2, you definitely can.
The very fact that you are making this thread is a good sign. Maybe people would just pick it up, think wahey, and not give the addiction possibilities a second thought, whether due to cockiness, ignorance, apathy, or just extreme self-confidence in their own ability to control their actions. So you're off to a good start! Hold onto some of that substance neuroticism - it will serve you well. Be mindful of your usage. I would suggest noting down your doses so you know how much you're actually using - I use this app "MediSafe" which is not perfect but the best one I've found looking for like the drug equivalent of a food tracker app. Again, many people are super causal about their use of addictive substances, and while many of them do get away with it and would consider my advice here a little neurotic - most people just don't have any real clue what they're taking in terms of frequency of use. So make sure that you do! Knowledge here is a huge advantage.
I haven't done coke for a while now, have tried to keep it down to a few times a year, have tried to quit entirely a few times but realistically when lockdown blows over a little more I'm already loosely planning a session with a friend or 2...

I don't buy so much anymore for that reason but when i was younger I used to frequently pick up 8 balls or more, and just put them somewhere reasonably hidden until a special occasion like a party or maybe just a friend coming round, when I'd break out one of the wraps (back in the day where my sources were all folder paper wraps)... and maybe another later on depending. Sometimes (not very often at all) I'd wake up and think hmm today might be a good day to do a little cocaine! It very rarely is really although the mornings are fun of course. The vast majority of the time though I have no desire to do coke alone, it is a very social drug for me and thus I don't have much problem just saving it for a social occasion. A few times last year (or was it the year before?) I was going through a kind of stressful time and a couple of nights I'd just go on a small bender myself... but I can count on one hand the amount of times this happened and I've been buying cocaine and storing it for a good few weeks or even months at a time for probably over 10 years now with of course, some fluctuations of lighter periods and heavier periods of use, but on the whole... Yeah, I've never had a problem keeping my usage in check really.
I'll just add a few minor caveats - I have for sure done cocaine on a whim - invariably when out drinking - alcohol is the destroyer of all sense and resolve, I also drink a lot less now which is probably also a contributing factor. Alcohol is another terrible shitty garbage drug that just happens to be legal so I'd advise that you cut down on that as much as possible if you are drinker.
Caveat #2 - drugs affect everyone differently, and my own experience of cocaine may be somewhat atypical. Usually after a binge - sometime into the next day maybe - it's like my body just rejects the coke and doing more only prolongs the anxious feelings and feeling of cardiac strangeness...
Of my 3 friends who I mostly used to do coke with, Friend #1 rapidly started spending all their income on coke, got kicked out of their flat, rapidly graduated to crack and shacked up with an actual crackhead (no judgement implied but this woman was not a good person), I didn't know her before she did any crack, but regardless of the cause that was the beginning of a downward spiral of a sort. He's pretty clean now I believe, has found a new partner, essentially cut off all his old friends (which was sad) and in my view is kind of stagnating in life and seems a little different to the person he once was.
Friend #2 didn't have quite as dramatic a story but eventually confessed to using a huge amount of coke almost everr day, and he was not an enjoyable person to be around a lot of the time, he would often tell me he could never hold it and would ask me to hold it for him sometimes. He's also gone up the drug mountain and fallen off the other side, so to speak, and is into the whole 12 steps thing, although he tells me he still thinks about it every day.
Friend #3, the final one from outside appearances has things together OK - and is one of my favourite people to do cocaine with - but he will, a few times a week, just pick up the most shite garbage purity street cocaine and just go on a solo all-night bender and be wiped out the next few days... usually I have to fend off a few amped up or sometimes amped up and also drunk phone calls imploring me to come over at like 3 AM to hang out and join in the (currently solo) party... I think he is dealing with some shit - aren't we all - and he is very functional, holds down a good job, etc, etc, but for me this pattern of multiple uses alone would be problematic. But, to each their own - I won't say he definitely has problem, maybe's he's absolutely fine and just likes doing his thing... Interestingly he really doesn't seem to get nearly as bad aftereffects as I do, often if we're hanging out I'll be like ah fuck man I'm going to bed at like 6 AM or something, and I have literally woken up like 6 in the afternoon to find him still sitting in my front room and just about to finish the last of the coke... I just could not do that, my body couldn't handle it I don't think.
I did have an ECG (Echocardiogram) a few years back while I was on a kind of hypochondriac health flex, and my heart was in good shape, no unexpected scarring or anything weird, which was not TOOOO surprising but I have definitely done so much cocaine before I feel like I'm just fighting off a heart attack for an hour or so... would not recommend that. I was informed also I have a slightly leaky mitral valve, which is apparently not too uncommon, in my case it is symptomless, but maaaaybe something I should bear in mind with cocaine in the future... although I fully into to limit my future sessions, no more of the multi-gram, 2 day binges of my relative youth.
I have a few other acquaintances or friends I see less often but I'll leave them out, apologies for this diatribe, I'm on a bunch of amphetamine and should really go to bed but I started typing and couldn't stop... if only I could consistently apply this to the stuff that actually earns me money. To summarise anyway,..
Track your usage, don't stress about it, and just don't use too often.
I generally have an issue with the characterisation of substances as intrinsically just super addictive, dangerous, yadda yadda... almost always this is exaggerated because of prohibitionist bias in the media - and simply unavoidable selection bias, in that unremarkable cases of responsible drug users will not make it into the news or literature. I even think this can be counterproductive because assigning too much power to the inert substance that is whatever drug you have - for me at least - feels somewhat disempowering. Just think about each coke session as a binge on a couple tubs of Ben and Jerry's ice cream or smoking like 20 cigarettes in row... I have no idea how close that comparison is as far as relative harm, but my point it... just remember it's something you need to exercise some restraint with, like you would any other unhealthy but enjoyable thing with the potential for overuse. To develop a cocaine addiction will not happen just from having it in the house, or even doing a few lines the odd morning as long as you keep it the ODD morning, not every morning or even every other morning ... try once a month or something... although actually saying that... maybe just avoid mornings... doing drugs too early in the morning doesn't usually work out that well for me, but, YMMV.
God this fucking amphetamine has glued me to the keyboard... sigh... OK, last thing now I promise.
To develop a cocaine addiction - or indeed, this goes for addiction to anything else - you need to do a lot of cocaine, frequently. If you do not use cocaine often, you will not develop a problem habit.
Don't complicate things, and try not to stress about it. Unless you do find yourself doing it all day every day for a while in which case of course do stress about it and do your best to stop ASAP, flushing everything if needed. We all have self control failures from time to time of course, but responsible drug use is a marathon that lasts a lifetime, if you trip up once or twice, pick yourself up (and by trip I mean use 2 days in a row, use it on a whim drunk, etc, etc... not pawn all your possessions for coke and put yourself at risk of homelessness... although even if you do do this you can still pick yourself up, your chances of success will just be a lot lower... ok, Captain Obvious out).