I can't do it anymore

I know that I am not that old but I realize that I can not do it anymore.  Drink that is the way I used to in college.  I used to be able to drink the way that I still do but now I am pretty much out of commission for a few days after.  I went out last night and had a blast something that was totally needed but then got home made myself throw up which then gave me a migraine which I still have today.  What the hell I am not even 30 yet I should still be able to handle my booze:)