Reason for this variations. 2 to 99. 8!

Temperature variations from 97.6 to 99.8 ,from 3 mnths,earlier widal o&h 1:160 ,during this also same pattern of temperature,taken antiboitics like gudcef,azithral,ornio,moxinow,doxt-xl for 20  days, widal o&h 1:40 but fever pattern is same ,doctor stopped antiboitics for 1mnth then also same,thyroid normal,chest x Ray normal,us abdomen normal,mantoux normal,Esr 26 in may now in June 4th  it is 10,crp 6,blood culture negative,smear for mp negative,widal igg&igm negative,scrub thypus negative,RF assay negative,no joint pains,appetite is good ,visted so many doctors all are saying it is normal when temperature is above 100 it is fever what else I should do ,I'm male due to which factors the temperature will varies,pls help doctors,morning after 12am increases to 99 , afternoon 99.4 sometimes 99.8, night it becomes to normal 98.4, sir,sometimes went outside and check temperature then it is 99.4 to 99.8 urine normal,if goingoutsideand then after 30 min check temperature it is 99.2 to 99.8