Thanks for your question on Healthcare Magic.
I can understand your concern.
Yes, it is possible to have breathlessness even if you are not a smoker.
Not only cigarette smoke, pollution, dust, chemical Fumes etc can also cause bronchitis.
When they inhaled in lungs, they cause irritation and inflammation (bronchitis). And this bronchitis causes breathlessness.
Inhaled treatment is the best treatment for bronchitis. You are not improving because you are not taking inhaled treatment.
So better to
consult pulmonologist and get done 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 improve with inhaled
bronchodilator (formoterol or
salmeterol) and inhaled
corticosteroids (ICS) (budesonide or
fluticasone).
Don't worry, you will be alright with all these.
Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.