I have a 3 year old that has been complaining of a tummy ache and has been lethargic with loss of appetite since this morning. She has a current fever of 101.2. Around 2:00 she woke up shivering and than vomited. I took her to the emergency room this afternoon with a low-grade fever of 99.2. They did a flu, RSV, and UTI test. The test came back positive with early stage of UTI, but I am worried there is something else from the symptoms she is displaying? She does not exhibit any signs of rebound tenderness in the lower right quadrant, therefore I do not believe she has an appendicitis. She has never sleep this much, only waking for about 2 minutes at a time.