For about two weeks, I've been having awful insomnia. I go to bed at 9 and read for a little while, but I don't fall asleep until 11 pm. Then, I wake up at 3 a.m. and then at 6, and maybe I'll fall back asleep for a few more hours. I'm tired during the day and feel sick sometimes. Also, I feel paranoid and scared at night. I toss and turn, afraid that someone will kill me while I'm sleeping. I have a bed facing a wall, but I have to have my back facing the wall so I can "keep guard" of what's in front of me. Everyone in my family goes to sleep quickly except for me. I recently stayed at a friend's house. I kept waking up in 2 hr. intervals. The next morning, she said I was screaming during my sleep and being paranoid. When she tried to comfort me, I kept screaming and sweating. I realized it was a symptom of Sleep Terror Disorder. This has never happened to me before. I've tried everything, like tea, exercising, and not having caffeine before bed--what is this, and what can I do?