I normally give them 48hrs for a temp to come down before I go to the Dr's unless they have that terrible tonsilitis breath or are holding their ears then I go sooner to get some antibiotics. I normally wait until after seeing the Dr to give them some panadol unless they are miserable then I give it to them before hand. For children a temperature under 38.5C isnt too worrying. I find nurofen can work better with temps than panadol, and check with your chemist but panadol and nurofen can be given at the same time for a short period of time

Big things to look out for are dehydration, increasing lethargy and sensitivity to light

I hope they get better soon