((((HUGS))))) I'm sorry, that really sounds horrible, I hope you will find a way to get peaceful sleep very soon.
I had a nightmare a few weeks ago.... It was a nightmare, and I "woke up" into another dream; it was a dream within a dream. When I actually woke up it took about 20 minutes for me to finally convince myself that I was definately awake, not dreaming again. I can't describe how incredibly disorienting the experience was.
And it sounds like your nightmares are much worse.
((((((MORE HUGS))))))
My roommate in college had sleep paralysis, but it was only when she took afternoon naps and it was warm in the room. I hope that the solution to your sleep problems will be that simple!