In the first few weeks of this diet, while your body is getting used to ketosis, it's very common to have lots of extra energy. I slept much less during the first few weeks too, but didn't feel tired. I eventually went back to normal sleep hours, but now I fall asleep more easily than I ever have and sleep more peacefully (except for that 2-a.m. trek to the bathroom).

If you think it is extreme, like you're not getting enough to be healthy, I would talk to your doctor. Otherwise, this is normal and will probably subside eventually.

And congrats on your weight loss so far. That's terrific!