U should do some lab test like widal, mp and most importantly CBC...if widal is positive,,typhoid is suspected,mp positive then malaria...cbc should be checked for platelet count and falling hematocrit..if both are decreased ...then check for dengue ns1 antigen assay..chickenguniya test and treat accordingly....
Next Steps
after getting test done...treat accordingly
Health Tips
take glass of milk with tea spoonful of turmeric and vit c if viral fever is suspected...take boiled water....avoid spicy food and oily preparation