perhaps you're a little worried about the side effects which is causing the sleeplessness??? I dunno, I just know when I started using the sh*t I was so worried about the extreme side effects that you learn about from reading bad internet sites and nasty forum threads that I had a little trouble sleeping. Then I realised that you have to be extremely unlucky to endure any sides at all - the major ones even more so, and got on with it.
No troubles now, and no actual sides either.