This past week I've had these headaches they're dull and come on around the same time around noon and last almost all day, and they're acocompanied by nausea, and it just won't go away any thought or smell of me is repulsive, if I do eat the nausea goes away for a while then it comes back, I am not pregnant I just got off my period! What could this be? I'm tired of feeling like this it puts me in a horrible mood and it's like I'm sick 24/7