I'm the same way. I'm going to assume you're pregnant. I'm 28wks tomorrow and probably the last month or so, I just hate going to bed because I know I'll toss and turn all night. Wake up for no reason then lie there for an hour trying to force myself back to sleep. Last night I went to bed at 1am and last time I had looked at the clock was 3am. Then I woke up at least twice (I of course had to pee the first time) and couldn't get back to sleep for at least a half hour. Been up since 7:22am, but I guess it's not as bad as having a new born.
My best advise to you is try to nap during the day. For some reason with my, naps let me fall asleep so much faster, must be a mental thing I guess...
Good Luck, I hope you get some rest!