Thanks for your question on Health Care Magic.
I can understand your concern.
You are having
chronic cough and breathing difficulty which is improving with inhaler treatment.
This suggest possibility of
asthma is more.
Asthma is actually life long disease. So treatment should also be taken life long.
But in my opinion, you should first
consult pulmonologist and get done PFT (Pulmonary Function Test).
PFT will not only diagnose asthma but it will also tell you about severity of the disease and treatment is based on severity only.
You will need regular treatment with inhaled bronchodilators and inhaled corticosteroid (ICS).
Oral combination of antihistamine and anti allergic drugs is also beneficial in your case.
Don't worry, with proper and regular treatment, you will be alright.
Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.