Hi Coĺeen, i have trouble with walking any distance,have trouble losing my breath. The tiredness really gets to me. I am not on oxygen yet. My levels drop into the high eighties when i make my bed or run a vaccum etc. If i rest they come right back up to 95 or 96. I’ m 65 yrs old and live in Florida. I will be flying next week to N.H. and I’m a little nervous about oxygen level. I haven’t flown since i was diagnosed.