my nine years old daughter is running low grade intermittent fever(99 to 100 deg F) for the past 02 weeks.It usually starts in afternoon and comes back to normal at midnight.Her appetite is good and there is no focus of infection found on investigations..Her u/s abdomen,x-ray chest andPNS,urine re and c/s,blood c/s,ict malaria,asot titre,bruclla antibodies,ESR,typydot,ALT,RFT and Tsh all are normal.Only positive symptoms are feeling hot and headache.Positive lab is raised TLC to 10.5 and neutrophil 70%.Please help.thanks