Hand numbness in the middle of my sleep wakes me. Like I am paralyzed. Scarey, why?

C T S. Most likely you have carpel tunnel syndrom please check it out.
Varies. There are multiple possibilities, among the more common is called carpal tunnel syndrome which is a punching of the median nerve at the wrist. There are other possibilities as well. I would not hesitate to be seen for evaluation, a nerve conduction test may be helpful as well.