Hoping for advice please from a fellow parent or someone with medical training. DS 2 came down with a slight fever Friday evening which worsened over night and we alternated ibuprofen and Calpol during sat to keep it at bay. We didn't quite get to maximum doses but they both wore off early so needing the other before the next dose was due. Only other real symptom was a nasty cough. I've called nursery and no significant bugs going round other than this cough and a couple of children with suspected tonsillitis.
Yesterday his nose started running and didn't seem to need as much medication as often so thought things were improving. Worsened again last night though with him waking at 3am boiling hot - temp of 39.6 the calpol lasted 3 hrs before back to the same temp at which point could give ibuprofen again. The temp does come down and when it's down he seems quite cheerful, will play and eat.
My question is how do you know if it's tonsillitis or something that needs antibiotics. We had a lot a lot of nasty viruses last winter that we just had to wait out. Haven't had the situation where we thought it was improving and then took a turn for the worse. I'm conscious we've got bank holidays coming up and I could call the doctor tomorrow but don't want to waste their time or take a kid with a virus into a waiting room with other people if it's not necessary.
Any advice welcome, sorry it's long