Daily continous low fever from 2 mnths.

Since2mnths temp varies from 97.6-99.8 ,earlier 2mnthback it isnormal,I'm 24 yrsmale ,first widal done o& h titres 1:40 temperature varies between 98-99.8 after 5 dayswidal o&h 1:160 ah,bh 1:20, taken antiboitics like gudcef , ornio,azithral,moxinow,doxt-xl,for 14 days,nextwidal o&h 1:40 but fever pattern is same,morning after 9am increases to 99 ,afternoon goes to99.4 sometimes 99.8 night after10 pm comes to normal,again went to doctor,blood tests smearformp(-),chest x raynormal,us abdomen normal, mantoux negative,CRP 6,ESR 10 ,earlier 2 mnth back it is 26 now it is 10,scrub thypus negative,RF assay negative, thyroid normal,blood culture negative, thypoid igg igm negative, antioiotics stopped 1 mnth back,what is the reason for this fever,visted 5 doctors(md gen med)saying that it is normal no need to worry Imine appetite is good , having headache,sir i want suggestion, fever continuing from 2 mnths isit tyhpoid,will mild fever occued in thypoid,sir,how to overcome this fever.plshelp.