Why is my sleep like this..? Desperate help needed..?

Hello. This happens to me too. It is very scary, but I've learned that if I concentrate on just moving my little finger, the rest of my body responds and I wake up ok. I've read numerous books on it, one of my favorites is "Soul Traveler: A Guide to Out-of-Body Experience... by Albert Taylor". It's his personal experience with it and how he's dealt with it. Hope this helps..