Was told I needed to be on oxygen 24/7 2years ago by my specialist. At that time I noticed that even with the oxygen when I got short of breath It didn't help getting my breath back. Had to change Pcp and went to see him, he said because my o/2 levels were staying high I didn't need to keep it on. Have not used oxygen in over a month and my breathing is as good if not better than when I was using the oxygen. Has anyone else had this happen?