That sucks sweets!! I would definitely go see a naturopath!! They can find out if anything is out in your body.

Have you considered chiro too?? If there is any bones out in your spine it could manifest in things like a low immune system etc! My chiro is awesome and I have been feeling heaps better (I was very much like you!) since seeing her regularily

Good luck and try to get as much rest as you can being a mummy.