went to casualty as i was coughing up blood [just blood]. they stated that i now have pulmonory fibrosis. i already have severe emphesema. i then went to return my cpap mask a week later and pointed out that my oxygen sats have fallen from 94 to 88 at rest. i was told they would monitor it and discharged me. IS THAT RIGHT ? as am also more breathless over shorter walking distances as well.