This is a very common thing that happens to a lot of people. When your body goes into sleep mode it has a natural shut down process. When you're in sleep paralysis. When we sleep we get sleep paralysis because it prevents us from moving while sleeping so we don't fall or injure our self. Sometimes your Mind wakes up but your body is still in the paralysis state. That's why you can't move your face, arms or body. Eventually you'll be able to move. Just give it some time.