Weird thing that I have noticed when I get drunk

Idk how to explain it I started drinking 2 years ago I noticed one thing whenever I get drunk it only last for like 30mins then I get bad headaches that feel like hangover I don’t normally drink much like 2-3 beers a month but in parties it can go up to 8 shots of vodka but I never black out like I said I just get drunk for like 30 mins the headaches