My 5 Year Old Grand Daughter Started Diarrhea Friday During

My 5 year old grand daughter started diarrhea Friday during the night, Saturday she has no appetite, vomiting clear mucous phlem, diarrhea 2 times , fever started up to 102.5. , Advil given in am Tylenol in the afternoon . Fever seems to be mostly during the day . During the night Saturday some diarrhea , and vomiting - clear ( same as the day before ), has no complaints of any pain . Just acting like she is not feeling well. Today no appetite , have been keeping her drinking Gatorade, fever around 10am was 102, gave Advil , checked temp after her nap. 3pm. Temp 103.7. , gave Tylenol and she was vomiting within 5 minutes.