Starting to feel nauseous even after light drinking

I always used to feel drunk before I ever got nauseous, being able to have 6-8 drinks in a pretty small window without ever feeling like I was going to throw up. But over the past few weeks I’ve started feeling slightly sick to my stomach after just a few beers or mixed drinks. I’m not really sure what could have changed to be honest. Does anyone know what could be happening? Thanks for the help