My 02 level seems to stablize at 98. However, when I walk a short distance, h I am out of breath and become very anxious. I sit down and check my oximeter and it usually indicates 97. Once in a while it will measure around 93 and then I will use my prn supplementary oxygen. I have never had this problem before ... just in the last month. This is very discouraging because prior to this, I have been able to walk long distances with no breathing proplems. I have just started taking Symbicort 160/4.5 and that has helped until now. What is even more discouraging is that I am a below-the-knee amputation and I have been increasing my walking distance with my new prosthetic. This is very discouraging ... up until now, my recovery has been A+ :-(