Also, i just had one this morning as well. I managed to lift my head up a few inches and examine the right side of my room, there wasn't anything there. I usually get out of it buy strongly willing myself to move. Trying as hard as you can to struggle helps as well. So far i haven't seen anything terrifying, but after reading your stories, i'm afraid they could happen at any time now.
Fear is the mind killer.
Fear is the little-death that brings total obliteration. I will face my fear. I will permit it to pass over me and through me. And when it has gone past I will turn the inner eye to see it's path. Where fear has gone there will be nothing.