My inexpert eyes are seeing two things:

* excessive calorie restriction (which puts your body in starvation mode) ... unless you're saving all your calories up for dinner time, which isn't such a great idea, either.

* inadequate fats (which your body needs for metabolism). Eat whole pasture-raised eggs, not egg whites; add a handful of nuts or nut or seed butter; have a tablespoonful of Udo's Oil.