For the past 2 weeks i have woken suddenly with an overpowering feeling that if i go back to sleep i wont wake up again. I have tried to keep myself awake and am losing sleep over the worry, i wake up seuddenly sweating, and shaking uncontrollably. For about a week prior to these awakenings, i have been having stabing headaches, but in the back of my head behind my ears, i was wondering if this has any connection?