First off I'm an 18 year old boy if that matters. I was at a party last Wednesday with some friends and I had some weed with me. I was really really high. I was so high that I couldn't think straight at all, and was just gonna nap it off on the couch. I woke up to a girl a grade ahead of me that I have a weird past with grabbing my arm. We almost hooked up in the summer, but I was just out of drug rehab and needed time before I could get into any relationships and told her that I didn't want to hook up or anything. So, after she wakes me up off the couch, She tells me she wants to go smoke in the bedroom to get away from the people for a little bit. So we go in, and I smoke first because she needed to see how to smoke the right way, since she hadn't ever smoked before. After I had smoked more, I was incredibly stoned and most of what I remember from the rest of the night is very foggy. What I do remember though, is that she did not smoke at all, she wasn't drunk either. I remember her taking her clothes off, then some stuff happening, then her putting her clothes back on and leaving the room. I didn't want any of that to happen at all, and I hated every fucking second of it, but I almost psychically unable to tell her to stop. I have felt so fucking gross 24/7 since it happened. I don't want to just say that she took advantage of me, because that's a big accusation, but I really feel like she did and it's messing me up so bad. I just don't know what to do.

EDIT: I know it's confusing, me getting out of rehab and then smoking weed. Me and the other people in my support group all smoke weed because it helped us get off of pills and other shit.