We Were At A Water Park On Monday And Tuesday

We were at a water park on Monday and Tuesday am. Last night around 4 am my 6 yr old child woke up complaining that she had a really bad headache. Gave advil and she went back to sleep. She now has a 103.2 fever and is still complaining of a headache. She has asthma, and seasonal allergies, no tonsils or andenoids. She is otherwise healthy. She received the flu shot in September