I Have A Finger O2 Sat Contraption I Put On

I have a finger O2 sat contraption I put on at night, while on my CPAP and each time I stir I check my SATS which range between 85 -95. During the day Im breathless and airhungry, yawning and trying to catch my breath, Im resting now and sats are on 95. My Dr says Im perfect.