How do you tell if you have a bad reaction to alcohol?

I’m sorry if I phrased it bad, and feel free to tell me if there’s anywhere else better suited for the post. But how do you tell if a reaction to alcohol is bad? and how bad is it for example? What’s normal reaction and what’s not?

The reason I’m asking is because I get so sick after hardly anything. I mean 3 ciders and I’m genuinely ill. It’s at the point where I’m considering to just never drink again. I get fever, crazy shivers, nausea, stomach pain, and so on. This past year I’ve started throwing up.. one way or another as well