Why is it that when I'm about to fall asleep or just wake up I can't move for a while?

The thing is that I have this huge discomfort(not pain) in my backbone(the neck area). My backbone feels like it is very weak and when I make sudden movements or move my head from one side to another it feels like it is about to brake. Lately, when I sleep on my back I feel alot of pressure on the back of my skull and the area starts numbing. This numbing slowly spreads to the rest of my body(fingers, arms, legs).THE BIGGEST PROBLEM: When I wake up I can't move for a minute or so and it's all because of the pressure on the back of my skull and neck.