can i just not handle my liquor ?

hi! new to this reddit and looking for some possible help! i’ve been drinking for about 6 years, not too heavily, but presently. in the early days, i could drink a lot. shots, malt liquor, beer, anything. about a year ago, i’ve started having this problem where any time i drink anything (i’ve tried different liquors /wine) i feel incredibly nauseated and/or throw up anytime i finally catch a buzz. nowadays i throw up after a margarita at a restaurant or half a cocktail at a bar. i also feel i don’t get drunk as easily and once i get nauseous, i sober up fully and can’t drink another sip. in the off chance i don’t throw up in the moment, i am always spending the next day nearly dying throwing up bile and massively dehydrated and ill, beyond your standard hangover. i like to drink and i work in liquor, i just can’t seem to stomach any of it. is it an allergy? is it a tolerance ? any possible cures?? thanks !