First of all I would advise you to change your cough syrup from bro zedex to only zedex. Along with that I would advise you to take tab azithral 500 mg 1 tab daily for 3 days, tab montair LC 1 tab at night daily for 2 weeks. All your symptoms are most lovely I love it I can you need to avoid dust and pollution and going out in the heat. Also continue with green tea.
Next Steps
if problem persists after 5 days Consult a ENT
Health Tips
goggle with chlorhexidine mouthwash for a little warm water and salt everyday 2 times