So I'm not positive if i am or not cause i'm never gotten passed a small drink but my dad, uncle and grandpa on my dad's side are all allergic to alchohol. They get a bad rash all over their body and they have a shortness of breath, is it possible for me to have these sort of allergies just cause I'm related to them?

Plus let's say i do start drinking, how do i know when too much is? cause i'm asian, i'm a girl, and a little over 100 pounds (don't worry i'm just short, i'm not anerexic or something) and like those are the three things not to be when you drink.