What happened friday night?

Last Friday, I got drunk. Like blackout drunk, and I never have before. I remember my boyfriend and I went to his best friends birthday party, I don't remember leaving the party. All I know is I woke up with my underwear & pants off. Bra and top still on. Trash can of puke next me. I asked my boyfriend why my pants were off and he told me we had sex, I told him I didn't remember it and he told me that I was unconscious most of the time and I would tell him to "stop" wait a few seconds and then tell him to continue. I thought it didn't bother me but we've tried to have sex the last two nights and I end up getting turned off and going to the bathroom and crying. I don't know what I'm feeling, and i have nightmares about it. I just don't know what to do. Please help.