I had a few days ago a dream where there was an evil guy who wanted to kill me, but then it was like I was half awake, half asleep. I remember seeing my bedroom, although it was all gray, and I also saw the evil guy from my dream. He was also gray, and kind of dim, I couldn’t see him clearly. I think this happened after I tried in the dream to just lie on the floor and do nothing (this usually just wakes me up whenever there is someone who wants to kill me in a dream). It was really weird, like I was struggling to wake up. Kind of like when you try not to fall asleep when you’re really tired, only about a hundred times harder.
What do you think it was? Was it maybe SP? It wasn’t scary. 
I think that was simply a dream. You are completely paralyzed during SP, hence the name, Sleep Paralysis.