sorry to hear that.
Here is what I think is going on,
The kind of Fever which you are talking about resembles much like an malarial infection.
Please answer the following questions to yourself.
1) did she has fever with chills?
2) did she went out for a field trip/camp with in last week?
3) any mosquito bites?
If answer to any two questions are yes.
even if answer in NO 103 is a high fever
and need to be addressed.
You must take her to doctor.