My one year old woke up and was restless in the middle of the night two nights ago. That next morning she woke with a fever. Throughout the day it progressed including a runny nose, irritability, tiredness, drooling, and vomiting after eating. These symptoms continue. The only thing she has held down is formula. She has not had a bowel movement in a day and a half. Typically she will have 2-3 per day. What are these symptoms pointing toward?