My daughter is 8 and gets the same fevers as you do. Low grade fevers that come in the afternoon and go away with Tylenol daily for a couple weeks straight. She has lactose intolerance and has Celiac's. However, if your doctor can't diagnose you and you continue with daily fevers, or notice rashes with the fevers have him check your SED rate. If it is elevated, he needs to consider Still's Disease. I have Still's Disease and it was very hard to diagnose. It is very rare!