KC:
I am sorry for what happened to you. I can only imagine how you must feel right now. Please put those feelings to a positive use and address the root issue that led to an awful experience.
IWW...in answer to your question, yes, two drinks can lead to a black out. It happened to me when I was on 1 mg. of klonopin and had one drink at home and then two glasses of red wine with dinner a few hours later. I blacked out for what I guess was 20 minutes.