She might just have a virus, be thankful we went through this a few months ago, really no fever, but she had diarrhea really bad. I would stick to the BRAT diet, bananas, rice, applesauce, and toast like one reader suggested, but first you need to get her to be able to keep pedialyte or water down. She will be fine with not eating that much, just has to have liquid so she won't get dehydrated. Every time I gave my daughter pedialyte in a sippy cup she would throw up again, so I called the nurse and she gave me the best advice I ever got. She said that is probably too much for her to handle, give her a syringe (those medicine syringes) full of pedialyte (about 1 tsp.) every 15 minutes for a few hrs. and if she keeps that down then try some applesauce. It is in such small amounts that it will keep her hydrated, but not too much to make her vomit again. It worked with my daughter, she was also feeling a lot better after she got some liquid in her. We went to the doctor as well and there was nothing that they could do, just let it pass, but my daughter was older-15 months. I would try he syringe with the pedialyte and if she still vomits, call the doctor again. Hope this helps.