For the past few months, I have been having the strangest thing happen to me before I fall asleep. I am lying there in my comfortable position and I feel myself ready to drift off. Then all of the sudden, I feel as though something or someone has hit me in the head with a sledge hammer. It doesn't hurt. I just feel the impact and it jolts me up and scares me pretty bad. Sometimes it will happen several times in one night before I fall asleep. I have no idea what is happening to me. Somebody please help me!!!!!!!!!!!!!!!!!!!!!