Why do i wanna throw up every time i drink alcohol? OPINIONS PLEASE!!?

ok so my brother is havin people over right now, and theyr drinking..so his friend asked me if i wantd to try some.. and gave me some of their drinks (" star") anyway so he gave me a really small amount but once i tried it ..i started to get nausious.....although it wasnt like hard liquor or anything. The thing is...im underage so im really new to this whole drinking thing (i dont drink often at all).. and on my 17th birthday ..my brother bought me alcohol and i got so drunk that i started throwin up everywhere ( i think i mixed the wrong alcohols) and then ped out. I think thats when i started feeling disgusted around alcohol (bad experience) but how can i get over this? i wanna start drinking with them again NOW!!