i have a sleep disorder that was caught on a sleep study. they could also tell i had chronic pain syndrome from my brain waves. i also had sleep apnea.

maybe seeing a sleep dr and having a sleep study would help pin down what the trouble is.

maybe you you're becoming tolerant to your meds. i take trazodone 200mg HS.
it's an AD but makes you sleepy. that helps me get to sleep fast. i don't usually stay asleep. i'm on cpap too but i don't feel it makes a difference.

my sleep dr says do NOTHING that is stimulating if you wake up. try to stay in the dark. don't watch tv, look at the clock, read or use the computer. i try to turn the lights off an hr before bed. and, try to work out a bedtime routine.
maybe someone could read you a bedtime story.

let us know how you make out.