My most visible problem has been waking up each 1 1/2 hrs to urinate, sometimes more often, throughout the night. Being new at this, I thought a little breeze blowing around my nose was normal, also marvelled at how noisy the wheezing, racing machine at the sleep center was. Went to sleep & woke probably 1 hr to urinate heavily (no fluids since abt 5PM), back to sleep & woke abt 1 hr to urinate heavily again, back to bed but could not sleep, thrashed about----this with 32 wires glued & taped all over my body, plus the oximeter on a finger.
Around 1AM, (I guess, no clocks allowed) the tech came in and changed the nostril inserts to large and put a chin strap on me and rehooked several wires. I had to urinate the third time. Thinking seriously of ripping out all wires and going home in defeat. Anyhow he put me back to bed---no breeze blowing around my nose, the CPAP machine became totally quiet and I quit developing the urge to urinate. Next thing I knew, he turned on the lights and said "6AM, time to go home". I did urinate, but nothing burningly urgent like before and not as much. I have not slept more than 2 hrs at a stretch in many years.
The kicker was that when he measured my blood pressure, it was 127/25. My blood pressure normally runs around 155/110 early mornings. On my sleep study morning, blood pressure was 194/126 (approx) and I had to talk the tech out of calling an ambulance.
Suddenly I am very hopeful; I see it is possible to control the constant waking; I just have to get my machine/mask working like the sleep center's (last half of nite). Had been thinking I would never find a solution, but hope at last!