What kind of spo2 monitoring device are you using? What percentages point to an actual problem?
I recently got a Garmin watch and turned on spo2 monitoring during the night. Most of the time I have >90%, but it sometimes drops to as low as 83% for around 15 minutes. I'm unsure how reliable the measurements are and if 83% is a problem or not.
(My current situation is the same as many others in the thread: Young, skinny, sleep problems, but the doctor is sure I don't have sleep apnoe, because I'm not fat...)