Thanks for writing your query.
After reading your post, it seems that you are having infection in the upper respiratory tract.
I would suggest that you should get the following investigations done :-
1. Throat swab culture.
2. Complete Blood Count(CBC).
You can take pain killer like Ibuprofen
one tablet twice a day after meals along with an antacid
20 mg for relief from pain and swelling.
Antiallergic like Fenofexadine
120 mg once a day will help in reducing the cough stimulus.
Antibiotic should be started after the culture/senstivity reports of the throat swab.
Gargling with antiseptic mouth gargle or with warm saline water will be helpful.
Also get your throat examined by an ENT specialist
to rule out tonsillar stone.
I hope this is helpful to you.