Feel like im going to throw up when I drink now

Was out partying yesterday started drinking at 1pm and by 10pm I couldn’t stomach any kind of liquor. Up until around 3 months ago I could drink as much as I wanted without any sort of negative effects but now it seems that I get a feeling like im going to throw up before I even get tipsy even. I bought several drinks at the club and couldn’t even finish a few sips without having to put the shot down because I felt the urge to vomit come up. I probably wasted like 30 dollars worth of drinks because I couldn’t drink it. Felt very stupid the next day. Even beer made me feel very sick. Does anyone know how to prevent this from happening?