I remember that well! I went through this really badly from about weeks 6-8, but it seems to have calmed down a bit now. It's so frustrating, because you're absolutely exhausted when you go to bed, and then a couple of hours later you're wide awake. I always wanted to go back to sleep when my alarm went off in the morning after tossing and turning all night!
I started to drink alot of camomille tea, and that seemed to work. Also, when I woke up I used to just read a book, and not try and go back to sleep, and eventually you do. I think it might just be one of those things that we have to put up with and it sorts itself out.
Good luck!
