I've had a similar experience. The first 2 weeks, I had a TERRIBLE time sleeping. But I wasn't tired - just wired and only sleeping 4 hours a night was ok. Not great, but I could function through the day ok.

Now, 2 months into Atkins, I sleep like a log, even through the noises that used to bother me before (except for the cloud of marajuana smoke that wafted in through an open window the other night )! And while I like sleeping 9-10 hours, and will given the opportunity, I don't have to.