Hello Baskar, Welcome to Healthcaremagic!
Dear, probably you are having URI. Do as follows:
1) Tab. Azithromycin
500 mg OD x 6 days
2) Tab. Aspirin
2 tabs 3-4 times a day for headache
3) Take a cough syrup-- like Benadryl
2 tsf 3 times a day
4) Take steam inhalation, do warm water gargles
Note that some of these medicines are prescription medicines.
If no improvement in 2-3 days, please consult an ENT specialist
. Good luck.