Thanks for your question on Health Care Magic.
I can understand your concern.
Yes, your all these problems are treatable but you need to take drugs for longer period of time.
No need to worry for pleural thickening. It is not a disease.
For
asthma and
bronchitis, in my opinion, you should
consult pulmonologist and get done
1. Clinical examination of respiratory system
2. PFT (Pulmonary Function Test).
PFT is not only diagnostic but will also tell you about severity of the disease and treatment of these diseases is based on severity only.
You will need inhaled bronchodilators and inhaled corticosteroid (ICS).
Oral combination of antihistamine and anti allergic drugs are also indicated in your case.
Don't worry, you will be alright. Consult pulmonologist and discuss all these.
Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.