Ahhhh, the poor baby. I would probably have a doc look in her ear, just so you know for sure if its an ear infection, then you'll best know how to treat it yourself. Ask the doc about the diarrhea, maybe they'll know if its an infection. Otherwise, try bananas and lot and lots of fluids,(no citric acid , of course). Maybe try Gatorade or pedialyte, for the electrolytes that her body is losing. Hope this helps!