Screaming in my sleep

I had a nightmare, which I then woke up from (in my dream) only to find myself in the same nightmare - which made me believe it was all real. In the first nightmare, I was in bed and I felt by body levitating. I couldn't understand why and for a few seconds I let it because I liked it. Then I got a little scared, when suddenly I started to hear odd noises, like muffled angry yelling. As the seconds went by, it got louder and louder, and I could feel an energy moving over me and the sounds were coming from below me. I became very afraid and wanted to wake up but I could not. I tried to wake up by screaming my roommate's name but all I could do was breathe out her name weakly, I couldn't scream. Almost like there wasn't any air in me. I became increasingly frightened and started to breathe heavily and she couldn't hear a thing. I heard her stir in her sleep. I finally was too overwhelmed by the noise, when suddenly I woke up. But I had woken up in another nightmare, where I couldn't move, I was paralyzed in the same bed. Eventually I woke up by screaming in my head "wake up wake up"