I know that I am underage and shouldn't drink, and I used to drink quite a bit, I quit for 9 months though after I started getting stomach issues. I used to be able to drink a lot and be fine, like not even get tipsy. But one night me and some friends drank a whole bottle of vodka, and now I can't even get through a beer with out getting shaky and feeling like I'm going to throw up. I don't know what it is. And I had stomach issues over the summer, where if I ate not even a full meal I would get the same feeling as I just explained. I don't know what it is, or what I need to do but it would be greatly appriciated for some inlightenment on my situation. Thanks.