If you rotate Tylenolol and Motrin every 4 hours, then that should hopefully make her feel a little better; if even to take fluids. Food is not a necessary, but water is. I have found that Pedialyte taste horrible and most children that I know will not drink it. You need something to stablize the electrolyte imbalance. I would suggest her favorite kind of Gatorade. That is great just for that purpose. Really whatever type of liquids you can get her to drink would be good. Water, Kool-Aide, Apple Juice, Gatorade etc...
A fever is a bodies way of fighting a virus or bacterial infection. A fever in it's self is not necceasarliy a bad thing. That is her immune system kicking in; and that is a good thing!
If your daughter is not urinating at all, then she HAS to go to the hospital. More than likely, she is dehydrated and in need of fluids. Encourage her to drink or you will have to take her to the hospital.
I have a daughter who has had a multitude of problems; urination being one of many. I have had to tell her at times that if she doesn't drink then I would have to take her to the doctor and they would have to put the needle in her arm to make her better. Believe it or not, it really encouraged her to drink. Do whatever you have to. As long as she is urinating a little, it's better than nothing, because that means her Kidneys are functioning!
Call your doctor! Ask Ask Ask Ask Ask... until you get and answer. Doctors are notorious for beating around the bush!
Hope that helps!
Take Care and Good Luck!