I've had this happen to me before I got pregnant and since I've been it's only happened once. As I begin to wake up I can feel mi body shake. But once im fully awake it stops. Im going to take to my dc abt it. You should to
My guess (from lack of information) low blood sugar or vivid nightmare
Um a seizure? You should probably go to the doctor hon!
Does not sound normal. Are you feeling ok?