True Primal

Bread and dairy are huge insulin/hunger drivers, so it's possible your overall calorie intake collapsed as you mentioned originally. You could try smoothies to just drink some extra calories, or dried fruit. Smoothies are historically discouraged a bit for exactly the reason that it's easier to drink calories than eat them.

What did you have to eliminate from your diet in order to be Whole30?

Smartwater Sparkling is pretty good also.