Well, I slept last night.
I had to kind of box in my CPAP with some pillows to muffle the noise while still giving it air to work with. Then I had to turn my fan up a little higher so that the white noise coming from it would help muffle the sound of the CPAP even more. It seemed to work. I got better sleep than I do the night before. So I count it as a success.
@peterdrake I’ve had this one for a little over three years I think. It was pretty quiet until yesterday. Hopefully I can get it replaced or at least fixed.