Date rape drugged??

So I had a party on Halloween and one of my best guy mates kept flirting with me but I wasn’t having it because he has a girlfriend who is also one of my good friends. Then later on that night I felt really dizzy and sick but I hadn’t drank alcohol all night and I ended up waking up to him cuddling me. I’m a virgin l (I’m 16) who’s never done anything with a guy and I don’t think we had sex but I don’t remember much and my friend that was there that night thinks he may have put something in my drink but I don’t know what to think or do. I’m not nervous of any sexual relationship but I didn’t want to do anything with him and didn’t want the first time I messed round with a guy to go like that but Idk whet to do. I was also sexually assaulted when I was 14 but it wasn’t anything “major” (if you get what I mean) I’m honestly just so confused and speechless. I woke up with a horrible taste in my mouth so immediately got out of the bed with him and brushed my teeth but someone said that that may be because he came in my mouth. Ugh Idk I don’t want to make accusations I just want to know wtf happened