Just want a sanity check as to whether you would be concerned. DS is 4 and has had a fever of up to 38.9 for 72 hours now, with no other symptoms. It drops back to 36-37 with regular calpol, and he is playing more or less normally and eating about 50% of what he normally does when dosed up. But he wakes sweating and shivering at night when due à dose. He had a urine test which came back clear and GP is saying to consider A&E to get bloods. Have yours had temps in this range with no other symptoms, and did you ever find out why?