Aching legs and high temp?

[Nikki2ol6]

My 7yo came out of school saying her legs really ached and didn't want to walk home and she felt sickly. She had a Christmas party at school so I thought too much jumping around and too much food...... When we did get home she put herself straight onto the sofa and put the tv on and lay there and told me she didn't feel well, I could tell she looked pale so touched her and was boiling hot so I gave her medicine but it was over an hour ago and she is still boiling she says her legs arnt so bad now but her head hurts. Could this just be a minor virus or could I be looking at something serious?

[hanban89]

Sorry didn't want to read and run. How is she now? It sounds virally but I would keep an eye on her and if worries OOH.