Thanks for writing your query.
can be due to some bacterial infection in the throat region.
You should first of all get a Throat swab culture done along with Complete Blood Count(CBC) to know more about your infection and the appropiate antibiotic.
Doing warm saline gargles will relieve throat discomfort.
Antihistamines will reduce the sneeze and the cough
DM will help to break down the mucus and help in its expulsion during cough.
You will need antibiotic if the culture report is positive.
Also get yourself examined by a Physician and an ENT specialist
I hope this is helpful to you.