question: I have asthma and chronic bronchitis  and have been on prednisone for 18 months. my lips and left hand fingertips  are turning blue sometimes. my 02sat was 96  @ pulmonologist's office and he noticed my fingertips were blue.this was a new pulmonologist that I saw to get a 2nd opinion. I forgot to tell my pulmonologist about it.I don't see himfor another week. Should I go to my M.D. or make an appointment with a cardiologist?