8 year old has a fever of 39.5c heart rate is fast and complains her chest hurts doctor said its the flu gave antibiotics and pain meds checked temperature after an hour no change should i take her to hospital rather?

Why ?: I expect the heart rate to rise by ~40 BPM for that elevation in temperature. Increased HR is a normal response that increases circulation of natural healing factors.Flu has its own pattern of fever that antibiotics would do nothing for. You can add anti-fever meds but they may also do little.With flu you focus on keeping fluids down & comfort. Go in if you are spooked, but I doubt they do much