i can’t hold down my alcohol anymore

hey!! i’m currently a freshman in college. i used to drink all the time first semester, i could drink beer seltzers shots everything under the sun and be completely fine but recently my body can’t even hold down half a seltzer. it happened so fast and i don’t understand it. i have never once been the type to throw up even if im black out but out of no where i can’t even drink a full seltzer. i’m not on any medication either so it’s really weird and it’s the same if i eat before or don’t eat. could it be some kind of condition?