I'm new here but found this site as I am so worried, have had a problem with breathlessness for a few years - my 2nd xray shows increased scarring at the bottom of my lungs and my oxygen level is low at 93%. The consultant wants an urgent CT scan, blood tests and bronchoscopy but said it was unlikely to be COPD or cancer (I did smoke, haven't for 15 years). Waiting for the tests, I'm making myself so anxious thinking that its progressive lung disease. Follow up appointment isn't for 2 months. Should I think the worst?