Have you had a CT scan of the chest?
Are you seeing a pulmonologist?
I would ask them CT scan of the chest and a referral to a pulmonologist
This is not related to your diving
but you can still have subtle abnormalities on the CT which are not seen on chest xray and you can have normal pulmonary function tests
get these done and I will reach out to you in about a month, ok?
did you see what I wrote?
are you still there
did I provide you with excellent service?