My daughter is 4 and has been sick for 5 days now with vomiting, temperature, some dehydration and her stool is yellowish. Shes not running a temp now, but still vomiting as of last night, very weak and only wants to lay down and sleep or she feels she will vomit. She hasn t even been able to hold down liquids for a long period of time and ends up getting sick. does this sound like a bad virus that just needs to run its course or would she have some sort of infection or stomach problem. She is having her tonsils out soon as well as an endoscopy procedure due to her having strep and stomach hurting continuously. What would be the next step to make sure it is a virus and not something else more serious like an infection or types of test to be run on her?