extremely early sudden onset intolerance?

I’ve never posted on Reddit before, but I’m really curious and would love some info or tips on whatever it is I’m feeling. I started drinking at 17 and for a whole year I drank like 3 times a week, it felt great and I never got hangovers despite downing the garbage gas station drinks I was ingesting😭 I actually enjoyed drinking. After I turned 18 it felt like a flip just switched, it got hard to drink even a sip of any kind of alcohol. After the first two bad hangovers I decided to just quit drinking because it’s not worth it. Now at 19 I can’t even smell or taste alc without feeling violently nauseous, even though I haven’t drank in almost a year? I know It’s probably just that I drank too much for that year and made myself like this. But it just feels weird considering how long I’ve been avoiding alcohol. I don’t miss getting drunk every weekend, but I do miss being able to enjoy a glass of wine with dinner every once in a while yk?