Regular fever from 2 mnths. Explanation.

Since 2 mnths temp varies from 97.6 to 99.8 ,earlier it is normal ,I'm 24 yrs male ,first widal done o& h titres 1:40 temperature varies between 98 to 99.8 after 5 days widal o&h 1:160 ah,bh 1:20, taken antiboitics like gudcef ,ornio, azithromycin, moxinow, doxt-xl,for 14 days,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 after 10 pm 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,sir i want suggestion,fever continuing from2mnths is ittyhpoid or vitamin deficiency,pls tell till now no proper reply from one doctor in this platform,hoping for correct & proper explanation.