DD (8) fell on Tues and hit the her forehead hard on ice. Glasses not broken, teeth all intact, nose bled profusely for a while but settled, she didn't lose consciousness. She saw the GP who said to keep her home the next day, monitor for excessive drowsiness, clumsiness, slurring etc.
She seemed fine yesterday. Went off to bed as normal. When I went to get her up she had a fever of 39.6. She said she'd been awake all night (which I doubt - she'd have been in to me), but despite calpol and calprofen the fever won't go below 39. She has no cold or flu symptoms. She says nothing else hurts except her ankles because she was awake all night 
Just a viral thing and a coincidence or?