It does sound like sleep paralysis. There are a couple of books written about it and I am sure you can do a search and find plenty stuff on the internet. If you are interested in lucid dreaming you can learn to use sleep paralysis as a spring board so to speak. If your lucky you might even have an OBE. You have to learn to get over your fear of it first. Wrestling With Ghosts is a good book.
I hope this has helped, Shoe