Having fever variations in a day.,

I'm 24 yrs male ,first widal done o& h titres 1:40 temperature varies between 98 to 99.8,before that it is less than 98.4, after 5 days widal o&h 1:160 ah,bh 1:20, taken antiboitics like gudcef ,ornio, azithromycin, moxinow, doxt-xl,for 14 days,then widal o&h 1:40 but fever pattern is same,morning after 9am increases to 99 ,after noon goes to 99.4 sometimes 99.8 night  comes to normal,10 days again went to doctor,blood tests  smear for mp negative,chest x ray normal,us abdomennormal, mantoux-ve,CRP 6,ESR 10 ,earlier 2 mnth back it is 26 10daysbackitis 10,scrub thypus -ve,RF assay negative, thyroid normal,blood culture negative, thypoid iggigmnegative, antioiotics stopped 1 mnth back,, mine appetite is good , having headache,no joint pains chest pain right side sometimes Ecg normal,what is the reason for this visted 5 doctors M.D Gen Med saying that is is normal no need worry if it is 100 then take it as fever ,I am worrying about this variations in temperature pls help me doctors ,