Glad you are alive, man. You should feel better in a couple days probably but here's the bad news bro: it won't get any better. If you are doing this at 20 consider yourself fortunate that you already have the experience of ina and out of AA, because at least you know there are ways out, including programs other than AA. But this kind of drinking for your age is a pretty good sign that your problem isn't likely to taper off, it's likely to increase and get worse. The length of time between binges doesn't mean anything, you will pick up right back where you left off. Alcoholism is progressive that way.
I'll tell you my story. I started drinking at 9 and didn't stop till I was in my 40's. I have terminal degrees in two professional fields, my clinical degree from an Ivy League. I've always worked, have a solid professional reputation, and was a highly functional drunk and addict. My tolerance over the years grew so high that I could not drink enough to get the drunk I craved, and because there was no such thing for me as leaving a bottle of anything unfinished this led to the inevitable alcohol poisoning that nearly took my life. In an attempt to feel my drunk I consumed a litre of 100 proof liquor in an hour or so. I remeber buying it and starting to drink it in three finger glasses chased with strong beer.
The next thing I knew I was strapped to a bed with a tube down my throat begging them to take it out. I had no idea that my mom had found me with dried foam around my mouth from seizures, or that I had coded and crashed 5 min after EMS hooked me up and then once again a few min from the ER. My breathing had stopped, my heart had stopped and had been in a coma for three days while my wife was wrestling with pulling the plug. That I regained autonomic breathing is amazing. That I am not intellectually disabled is a miracle.
Looking back from years away its easy to see what was happening to me and I'm very, very lucky that the desire to drink was completely lifted, like pressing a reset button. But I am very clear that were I to resume drinking tomorrow I would be right back where I was the night that happened, probably in about a week or 10 days. And that, as they say, would be that.
You will never be able to drink normally. You will always be a blackout drinker and an alcohol poisoning drinker. The sooner you come to terms with that the sooner you can learn to move on with your life. If you continue to try and find out the hard way chances are you will wake up dead, and that's a fact.
Best of luck. Keep coming back.