Eat protein! My doc has me eating a protein every 2 hrs for that reason and she put me on iron
I make sure I'm on time with the prenatals.. but I know I'm not eating as much as I should it's just hard because I get sick so easily.
I feel the same sometimes, it may be your bp - I know mines is high a lot of the time & this happens with a headache. Are you eatung enough often? & are you taking your vitamins? You know the baby takes all your nutrients, leaving you extremely fatigued.