Follow-Up:
what you are experiencing sounds very much like sleep paralysis. my brother in law suffers from this, and it is physically harmless. emotionally however, this can cause great distress. it is obvious to me by your letter that it has caused you a lot of suffering. my suggestion would be to have a sleep study, or see a professional about this disorder. the solution may be as easy as keeping your feet uncovered. best of luck to you!!