Is cheap alcohol supposed to make me want to gag, or is it just alcohol in general?

I used to be able to hold my liquor well, then i didn't drink for a while, and i felt like drinking so i bought cheap alcohols, whiskey, tequilla, vodka, a bit of everything, and all of them just make me want to spit it out as soon as it touches my mouth, and it just makes me feel sick if i do drink it.

I dilute it with A LOT of pepsi but its still terrible.

i think ive gotten alcohol intolerant, but i barely drank at all. i only drank when i was 24 year old and had a girlfriend and going to bars once n a while