Going to see the pulmonary Dr next Thursday. Wondering if he will want me to start using the Bpap machine? My oxygen level went from 82 in Feb. to 52 this month.... I called my Dr. like Glen suggested.. He said to wait and see what the pulmonary Dr. said.. So that didn't work Glen, He didn't seem real concerned about the drop. Said I am still in a pretty safe range. What is unsafe???? Wondering? Anyway I hope to get all the tests and I surely hope he wants me to get one. In need of more energy...... Linda