Man With A Knife, Scarred Faced Man, And Body Frozen

This is my first time coming out about something like this because I have always pushed it away and thought it was just my imagination; but here it goes:

I fell asleep in my boyfriends room and in my dream (I thought this was real) there was a loud knock at the door. His roommate got up and opened the door and was stabbed in the stomach. He fell down and the man busted open the door, pointed the knife at me and said, "I am coming for you" and began to run at me. I woke up just before he got to me and I saw something on the ceiling. Then I just stayed awake for the rest of the night trying to interpret what had just happened.

The second thing that had happened to me was during finals week when I had taken a nap. I thought I had woken up and it felt like I was having an out of body experience. As I began to "scream" my roommates name I realized that she couldn't hear me at all because I was still sleeping. Then as I looked around, three people kept appearing but in a flash, it was a big woman with black hair, a little boy with glasses, and another man who I can't really remember since it was about 6 months ago. I felt their presence and I knew that they needed my help for something I could feel it, but then I woke up and it hasn't happened since.

My last story that I am going to put on here is when I was dreaming I was in my Spanish class. I began to look up from my notebook and I saw a man in a long black trench coat looking down on me. He had a hat on so I couldn't really tell who he was, but he followed me everywhere I went. When he revealed his hat, I freaked out because his face was covered with stitches, scars, and a swirly tatoo around his head. He told me his name and asked me to help him and I didn't know how, so I just left it alone. I googled his name to see if anything popped up but nothing did so I figured it was just a bad dream.

Can someone please tell me what I am experiencing? Because it's something that I really want to figure out.