Sir,I am male , I am having fever for almost 21 days and i sonographed and found to have lymphadenopathy multiple enlarged mesentric lypmh node one of which is about 25×18 mm in size and so doctor advised me to done with CT scane . For Doctor prescribed me Dolo 650 which is reducing my fever but still after 10 to 11 hours it backs,along with this i am taking other medicines also for 1 week ... my ESR is 53 , WBC is normal ,no HIV,No malaria or dengue . .. so what i do then , is it serious ?