I feel like I should be a 'poster boy' for C-PAP!
Sleep Apnea was only explored because my at rest heart rate suddenly went from 80 to 128 - so lost my medical card (truck-driver). Never knew I had any issues with OSA...
Then I did my set of sleep studys - turns out I had "life threatening Obstructive Sleep Apnea"! And the DR was very surprised that I did not consider myself to have any 'sleep issues'...
Turns out I did, and never even knew it! Could never eat a meal without getting ill for the first 4hrs after waking. Could take a nap anytime, anywhere, even 20 minutes after waking up! Never dreamed! Sheets and blankets just destroyed every morning, woke up tired often (drove truck - thought that was the reason), woke up sore and achy too.
Got my "dream machine" and taught myself to breathe through my nose only (needed and later got nose surgery - was a mouth-breather), and I knew the morning after the first night! My wife said I fell asleep in like 5 minutes, and never moved, and the bedding was not even messed up.
THe dark circles under my eyes (had for years) slowly went away. I dream now! I feel rested when I wake up! I am (sometimes) hungry upon waking! I rarely nap anymore.
The whole process is simply the most critical medical change in my entire 47 years of life! Some 10 odd years later, I do not even take a 15 minute nap without it, PERIOD!!
Oh - and my at rest heartrate is in the low 90s now, and no snoring either...oh, and can sleep on my back now too
HTH