Did I have an outer-body experience and did I go somewhere?

It happened this morning at my friend's house and I was sleeping on my back on her couch. I was by myself and I had woken up before it happened and then it sort of felt like I was drifting off into a dream. I got that feeling of oblivion to where you are physically (that's why I thought it was a dream) and I was at this place, I don't know where. It looked like I was going down a sidewalk in a nice neighborhood and all I wanted to look at was this huge tree. It was one of those cherry-blossom trees with the pink flowers and it was so beautiful. I had a feeling of peacefulness and everything was so vibrant and bright. I felt like I was floating and this whole thing lasted for about three seconds until I was abruptly 'pulled back' to my body. I woke up but I couldn't move for what seemed like for a long time but was probably a second or two. I was finally able to open my eyes and at first it didn't scare me so I just tried to go back to sleep. I didn't go back to that 'dream' but I started to get a feeling that I was rising out of my body and I felt detached to it. I could move my hands but I knew I wasn't moving them physically, but I could still feel myself moving them. I had a little sensation of vibrating, and this next part scared me the most. I heard what sounded like two or three men talking really fast. I couldn't tell what they were saying but I could tell they were speaking english. Were they 'ghosts' or was it just my imagination? Anyway, this happened and I made myself come back but I had the paralyzed feeling again. I tried going back to sleep again after that and it happened a third time, each time feeling like I was suddenly pulled back. After that I rolled over because I felt that if I did, I wouldn't float away again. Obviously I was right because it didn't happen again. I've been thinking about it all day because it really scared me, especially the part with the voices. I've had these sensations many times before but never when I've been so consciously aware. I've always been falling asleep or already asleep and wake up because I felt like I was suddenly falling. I've heard you can travel outside your body but I've never experienced it until maybe now. I often have events where I'll be doing something and I'll suddenly feel like I'm in a movie and I'm in someone else's body, although its mine, but I don't recognize it. Is this another kind of outer-body experience? Is any of this considered an outer body experience or am I imagining things or am I just mentally ill? Can anything bad happen when this happens? Is there any reason for me to be scared? Please help me, this has left me feeling very uneasy.