I experienced the same thing. 2-4 weeks where I was slightly sluggish in everything. Eat more fat! When you come out on the other side of this, it goes directly in the opposite direction. You will experience having a constant energy all day regardless of your level of activity. I had to lean how to sleep again by using mediation techniques to fall asleep for a while. There is no absolute high, but also rarely a low, so come night time, start to gear down about eight o clock and as soon as you feel the slightest sleepy, dont ignore it, go to sleep.
Here in the beginning you can eat a bunch of berries, honey. Get some unprocessed sugar, most of us are addicts but dont realise it, even when we eat "healthy", and what you describe sounds suspiciously like sugar withdraval syndrome. It can take as much as 6 weeks with abstinence before it passes.
Now I am going to speak out of my ass. I suspect that the more pristine your source of food (raw animal), the better you feel and thus anything slightly off in the body becomes obvious like never before.
