Thanks for your question on Healthcare Magic.
I can understand your concern.
In my opinion, you are mostly having post infectious bronchitis.
Bronchitis is inflammation of airways. And it is common after
lung infection like
tuberculosis.
You are also an active smoker. So possibility of bronchitis is more.
Your symptoms like chest pain on breathing (pleuritic pain), heaviness in the chest etc are commonly seen with bronchitis.
So
consult pulmonologist and get done clinical examination of respiratory system and PFT (pulmonary function test).
PFT will not only diagnose bronchitis but it will also tell you about severity of the disease and treatment is based on severity only.
You will mostly improve with inhaled
bronchodilator and inhaled
corticosteroids (ICS).
Don't worry, you will be alright.
Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.