That should have been done from day 1. Now, however, there are 1000s of doctors who make fat stacks prescribing CPAP machines, and they'll fight tooth and nail to not lose their whole business.
My dad's friend died like that, not a flu, but was traveling overnight and didn't take his machine and died in his sleep. Although I almost wonder if this heavy reliance on cpap machines causes people to lose some innate ability to recognize when they stop breathing or at least delays the normal instinct to wake up and breathe.
What change did you see in your sleep routine?
I hope there's some insight beyond what I've got, but just from my experience: Sometimes having it blasting at the pressure you need while trying to get drowsy makes that process uncomfortable, but, after you've gained drowsiness it's not going to interrupt you and wake you (unless it starts leaking pressure against your face)