Thanks for your question on Health Care Magic.
I can understand your concern.
In my opinion, you are mostly having post infectious
bronchitis.
Pneumonia causes inflammatory changes in lung.
So some patients tend to develop bronchitis after pneumonia.
And it causes breathing difficulty.
You need PFT (Pulmonary Function Test) for the diagnosis of post infectious bronchitis.
You may need inhaled bronchodilators and inhaled corticosteroid (ICS).
Don't worry, you will be fine with these drugs.
So consult your doctor and discuss all these.
Hope I have solved your query.
Wish you good health. Thanks.