mastitis, flu, pregnancy? help

Naomi
Hey ladies I need some help. I think I might have mastitis but I don't know really what's going on my symptoms point at a lot of things!
-sore boobs (I am breast feeding), but it's not painful to nurse. Also very swollen and big but not engorged!
-fatigue
-I've had a head ache for days and it's recently turned into a migraine where I feel like puking
-I'm having hot and cold spells(no fever
And it's not possible that I am pregnant unless I can feel symptoms 3 days after! Help...