Welcome to HCM,
After going through your history,your tightness in chest and radiological finding are pointing toward the bronchitis
which could be due to allergy
,post viral,or ?smoking
In early stages you may not have breathing difficulty but just tightness in chest with cough
You have been given anti inflammatory treatment just follow it and follow up with your doctor if everything improves just stop of smoking if it is ther.
If you cough persists or there is any breathing difficulty then work up like pulmonary function test and allergy testing, and serum IGE level may be done to find if there is any thing, then you can sees a Pulmonologist if required.
If everything resolves then just follow healthy life style .