First body overheat normal temp.after 5 days temp is blln 99 to 99.8 with headache,Widal o&h is 1:40,malaria -ve,after 5 days Widal O&h 1:160,esr 26,taken antiboitics like gudcef 200,ornio,rifagut,azithromycin,moxinowfor 14 days,but fever pattern is same morning after 8am 99and afternoon it is between 99.6 and evening at 9pm it is 98.6,widal done o&h 1:40 stopped antibiotics for a month .Now today is 50 day,Esr 30,crp 6,tc 12900 ,smear for mp -ve,urine 2-3 Pus cells, calcium oxaclete crystals +♀+,chest x-ray clear ,thyroid normal,bp normal ,us abdomen normal, bleedingtim3min, clottingtim 4min,I am having headache,fever in blln 99 to 99.8 , now  doxt -xl antiboitics used for 5 days,2 days back tyhidot igg igm -ve ,esr 25,wbc 5600,RBC 6.3 Millon's,pcv 60, platelet 1.65lks,blood culture negative.doctors what is the reason for this fever pls explain from 2 months ,some doctors saying die to stress some hormones are increasing the body temp ,how to proceed further .