V.W.
Sounds like it could be an ear infection or fluid behind her ears. My son did the exact same thing. I took him to the peditrician b/c I was exhausted & frustrated- he had an ear infection in one ear & fluid behind his other ear. He never had a fever so I had no idea he was hurting anywhere. When babies nurse it relieves the pressure on the ears. Also, when some babies get ear infections they spit up- their equilibrium is off and it makes them dizzy and thus upsets their little stomachs. It probably wouldn't hurt for you to take her in and atleast rule it out. Good Luck and Hang in there!
V.