gapeachy, that sounds like you tried too much of a good thing. Most "doses" are in the range of 2-3 tablespoons of ACV mixed into a cup of water (often with honey). I can quite easily see that a whole cup of the stuff would make just about anyone sick!
I have used ACV recently when ill with ?food poisoning. It kept me from getting really really awfully sick. I wouldn't have even known about ACV except from reading the backyard poultry article and some posts on here. Since it works on me, I'll be trying it with the gals.