Thanks for your question on Healthcare Magic.
I can understand your concern.
Since your all cardiac reports are normal, we should definitely rule out lung diseases (
bronchitis) for your symptoms.
So
consult pulmonologist and get done clinical examination of respiratory system and 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.
If PFT is showing obstructive defect then you will need inhaled bronchodilators (
formoterol or
salmeterol).
If PFT is normal then no need to much.
Sometimes stress and
anxiety can also cause similar symptoms.
So avoid stress and tension, be relax and calm.
Don't worry, you will be alright.
Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.