To know what it is exactly due to,i need to know whether,in addition to fever,you have cough/runny nose/throat pain/abdominal pain/nausea/vomiting/burning sensation on urination/increased frequency of urination.
if it is fever with cough/throat pain you can take
paracetamol,antihistaminic,and antibiotics like
azithromycin.
if it is fever with abdominal pain/vomiting/dysurea, you can take paracetamol with antibiotics like cefixime/
norfloxacin.
if it is just a fever,take paracetamol only.
i guess,you do not have any medical illness/drug allergy/
pregnancy.
meanwhile,take plenty of oral fluids,bed rest and light food.
i hope you will find this information useful.wishing you a faster recovery.thank you.