I have not been officially diagnosed. I used to wake up gasping for breath and didn’t know why. My girlfriend at the time informed me that when I slept flat on my back I would be gasping for air until I would eventually wake up to a large gasp for air and was almost completed out of breath. I have not had this happen in the past 6 years because once I found this out I started to change my sleep position. Sleeping on my side or having my head propped up just a bit has prevented it from continuing. I have never had the need for a sleep apnea mask. 