HI K.!
I ditto the other moms.. it could just be a virus that has been going around.
Keep an eye out, and don't be too alarmed if she develops a flat pink lacy rash on the trunk of her body. My son had a fever for 3 days (it was high...102-103) we treated it at home, i did call the ped though, and they said give tylenol (we can't use motrin because of the stomach upset issue with Ibuprofen - he had reflux - it has never made my kids fevers budge though, so I don't ever use it anyway).
anyway...If she develops a rash, it could be roseola. characterized by a moderate to high fever for about 3 days, then the fever breaks, and the rash appears. no other symptoms (at least from my little guy - unless you count him being cranky).
I dont believe there is anything they can do to treat it - it's a virus, and it is contagious. My ped. office diagnosed over the phone and said they didn't need to see him for roseola. let it run it's course.
I have found a warm bath helps a fever come down, and makes them feel better all around.