Hi thanks for asking question.
You had mostly
flu like viral infection in past most probably.
So you have
cough that has not gone still now.following is some remedy for you.
Take antitussive cough serum containing
dextromethorphan.
Green tea is useful.
Drink more and more water you can because water has antioxidant mechanism.
Eucalyptus cough lozenges helpful.
Plantain leaf is useful home remedy to ease cough and sooth respi tract.
OSHA root , ginger also useful.
Onion having antiinflammatory action so useful.
Take green leaf vegetables.
Avoid
smoking and spicy food.take fried food minimum.
If still symptoms not relieving then chest
x ray done for further investigation.
I hope my suggestion will surely help you.
Dr.Parth