If only fever is your chief complaint, than paracetamol tablet 500mg 1tab twice daily after food for 5days. alongwith tab famotac 40mg 1tab twice daily before food for 5days will be enough. You should take
vitamin b complex as Cap Cobadex Forte 1cap once daily for 10days. If you are alcoholic than avoid it. If fever still persists after all of these, than take antibiotics as per your physician choice. If fever continues after taking antibiotic, than get admitted in hospital for proper investigations, final diagnosis and further treatment.