Thanks for your query.Based on what you have stated It appears that you have severe Upper respiratory tract
Infection It will be better if start taking some antibiotics and some cough
syrup that liquefies the mucus secretion of the respiratory tract.Continue gargling using warm salt water.Get your Blood test
for Haemogram done to confirm the infection.Please consult your family Physician or some ENT specialist
for medication This should resolve in a week.