Pulmonologist should do a detailed study.
In the spring with us is a lot of pollen - grass and trees.
Perhaps this is the reason - though - before my allergy manifested in a large runny nose.
I took a drops to nose and were correct
My rhinitis appeared soon as had a contact with the allergens.
Now I do not feel any apparent reason my breathlessness.
Most often it occurs in the morning when I wake up - sometimes at night around 3.00 (for a while)
Maybe I'm allergic to my wife ????????????