Hi,
According to your symptoms, viral fever could be the cause of it.
Investigations :
complete blood count and Dengue NS1 antigen, malaria antigen test
Treatment: Tab paracetamol 500mg thrice daily. Tab Montair LC once daily, Syp. Brozeedex 1 TSF thrice daily, Cap. Becosule once daily. Plenty of oral fluids ORS