Has anyone else experinced this?

For context, I’ve been drinking for years with no problem I could throw back at least half a Costco vodka bottle in a night. Even just maybe five months ago, I was doing the same, finishing a smaller bottle a night.

But recently, in the last few weeks, I’ve noticed that even after just one drink, I feel nauseous and just ill. I’m mostly just confused about why that’s happening now, because I haven’t really changed anything in my life except my diet, which never seemed to affect it before.

Even when I drink plenty of water during the day, I still feel sick. The weirdest thing is, I don’t get a hangover or even feel drunk or tipsy. So I’m not sure what’s happening or if this has happened to anyone else?