Suddenly reacting weird to alcohol

Hi, I (26,F) have been having weird symptoms after drinking any amount of alcohol. Yesterday I had one pint of ginger beer and immediately felt drunk and like i had vertigo.

Previously I could handle my booze well enough, I would drink socially on weekends and wouldn’t really go overboard, I stopped for a few months when I was having really bad GERD issues – potential ulcers but the PPIs i’ve been taking have sorted that out so I thought I could have a few drinks again. Ive had no heartburn- just feel incredibly dizzy and lethargic after small amounts of alcohol.

I think I get mild flushing but i’ve always had that, I dont get hives or stomach pains or nausea. I’m going to go my GP and see if I can get tested for alcohol intolerance anyways, just because I want to know for sure.

Anyways if anyone else has experienced this please let me know if it goes away or what you did to help? or if I just need to stop drinking forever?