Do you know if you are allergic to one of the plants that are in bloom right now? In my area (northern Arkansas), rag weed is in bloom (UGH!
) and I have a bad allergy to it!!
The other thing is that you are taking corticosteroids - the Fluticasone in the Advair. Steroids suppress the immune system, allowing these infections to spread unchecked. So you should see if there's another way to help you when you have these issues.
Babesia is well known for causing breathing issues. Do you know if you have this infection?