My sick little girl

What was a runny nose on Monday turned into something on Wednesday. She has a runny nose still and a her fever is running 100-104. We went to the pediatrician Thursday they said she either has a viral cold or a UTI. I was supposed to get the lab results today but they weren't ready. Her fever broke last night (or I thought it did). It returned this afternoon and brought back a case of watery diaherria and vomiting. The on call nurse advised me to give her Pedialyte to keep her hydrated. If she still has her fever in the morning, I was told to call her pediatrician back for our next course of action.