I am 53 and have recently had a mild heart attack and was diagnosed with degenerative disk disease and just found out that I have moderate restrictive lung disease but I don't see the doctor for a couple of weeks. All I know about it is what I read on line and I ended up scaring myself. Do most people get a lung biopsy. I have had a ct scan that showed scarring and a breathing function test that showed the restrictive lung disease. Any information would be appreciated. I am on a cpap machine at night and still get breathless at times. I am tired all the time and when I walk short distances my back freezes up. Does this sound familar to anyone?