My next paycheck says you sure as hell ain't no virgin after spending a blacked out night with a guy.
You will never know if you don't ask, which is more important knowing, or facing the fear. Not a good person to have had sex with someone who had a black-out. He is an awful person. Not cool. Don't beat yourself up over it, somebody should beat him up!
You know that could have been rape.
If he had sex with you while you were blacked out it was most definitely rape.
You have to find out what happened!
Also, you were very drunk right?
If it was rape it could be hard to pursue a case because they may just think you don't remember consenting.
Good luck :)