The baby had loose stools for a week. I didn't pay much attention to i…

The baby had loose stools for a week. I didn't pay much attention to it as the baby was calm. Yesterday night the temperature suddenly rose, in the morning she called an ambulance with a temp of 37.8. The baby is restless, the doctor says the throat is slightly red but not scary. There are no other symptoms. Is this flu? Or because of teeth? Or enterovirus?