Do you drink between binges at all or is it just that once you start you'll inevitably keep binging until you crash, days or weeks later?
Yeah, opiates and alcohol are a bad combination.
You might already know this, but some of the same drugs which are used to help people with opiate problems are also used to help people with alcohol problems. It's something you might want to look into if you're interested in getting your use of both under control. They're not "cures", of course, but they can be useful tools in getting your life back on track.
I abused the fuck out of alcohol for decades, having multi-day benders on a weekly basis. While binge drinking is never a good thing, how you should proceed depends somewhat on how often you binge drink. You're going to feel like shit no matter what after a multi-day binge but how you should approach ending that binge depends on whether you're physically dependent on alcohol or not - so some information about your drinking habits would be helpful here.
Hydration and sleep are your friends. OTC medications to deal with vomiting and diarrhoea can also help. Try to eat even tiny amounts (many a time I've only been able to get down a quarter of a slice of toast in the days following a binge but even that small amount of food helps).
If hangovers and alcohol withdrawal after binges were a deterrent, none of us would ever binge a second time. Alcohol mightn't be your DoC, but the fact that you go on week long binges suggests that you have an alcohol problem, so I'd make addressing that part of your overall plan to address the role drugs are currently playing in your life.
You'll likely hit a wall quite soon where you're just too sick to drink for a day or so even if you haven't run out of booze. You're going to feel like crap when you hit that wall as your body deals with the effects of both alcohol toxicity and alcohol withdrawal, but it's your opportunity to end this particular binge.
Coughing up blood while binging isn't especially uncommon, but it's something you need to get checked out. You mentioned in another recent post that you think you might have an infection from skin popping. There's honestly no way for us to know whether your current symptoms are just alcohol related or whether there's something more sinister going on, so I strongly encourage you to seek medical advice sooner rather than later.
I know you asked for advice about the physical stuff, but your recent posts indicate that you're in a pretty dark and dangerous place right now. I understand why you're so reluctant to see a doctor, but self-care isn't helping you a whole lot at the moment.