I need advice on respiratory illnesses. Thanks!?

You sound like you are really having a large problem. I think that you could have allergies. Allergies can do the same thing that you are talking about. Also, anyone with asthma knows it is hard to breathe with it. Find A doctor that knows nothing about your previous symptoms. Go to him and don't tell him anything about your prior health problems. Then ask him to check you for allergies, or asthma. If things are still wrong after he checks you then you will have a clearer knowledge of what is happening to you. Try to find something to do to help you settle your nerves. I do embroidery, music, and other things. Good luck to you.