No you're not a junky, but you're heading in the general direction. I guess you'd be in the beginning phase. The good sign is that you feel guilty (although I don't think you have anything to feel guilty about) because you are less likely to let things get out of hand if you feel guilty about this level of drug use even when you don't have any responsibilities.
I didn't feel guilty for a long time, it was more like what will this pill do to me? what will this other pill do to me? what do these drugs feel like when I'm out at the bar? Is it more fun to play the guitar on these pills or the other ones.....etc.....I would just get caught up in how it all felt, never had any moral issues with it, and I always continued to follow my dreams and live my life until one day I realized I couldn't function without the drugs. Even then I didn't worry about it, I just made sure I had the drugs I needed and kept going on my way. Somewhere along the line I realized I had some major addiction issues and I quit drinking (mostly), quit weed, made some lifestyle changes and got some professional help for my depression anxiety stuff. I'm still dependent on benzos and opiates but they are at therapeutic levels and I keep a close eye on my drug use. Obviously not out of the woods and I think about drugs way too much.
So maybe it's good that you feel guilty, you can quit now and save yourself a shitload of trouble down the road. Find what you want to do, you sound young, it's essential to find something you love to do whether it's a career or hobby to keep your life moving forward.
p.s. stay the hell away from xanax, it seems harmless but it will own you if you keep it up and it's very hard and not to mention potentially dangerous to come off of on your own.