Thanks ladies.

The frustrating thing now is having to wait more than a week to find out if it is idiopathic or if there is a more serious cause, and then wait more for whatever treatment is appropriate -- unfortunately many of us know this feeling all too well. I did try to expedite things by going to the radiology department in person and then back to the doctor's office to schedule the follow-up appointments, since they are located in the same hospital.

Overnight I decided to make an appointment to see the pulmonologist, just to get his input -- he also does critical care which I think gives him a broader view of things. Unfortunately his first available appointment is not until the end of June. So I sent him an email instead to ask for a referral and if he felt it would be helpful for me to see him.