22 and hungover

i just recently graduated from a party university we would go out and party and drink all the time. id come home always feeling fine and then sometimes in the morning hungover other times more hungover. now whenever i drink by the time im home and like not even in bed im extremely nauseous and ill. im also usually not that drunk and i regret drinking all those drinks because in turn i feel like shit. does anyone have an idea what this sudden change is. i’m also a type 2 diabetic so i drink mostly no sugar drinks