I can only speak from my personal experience with this and I have had similar experiences with cpap therapy off and on over the last twenty five years using different machines. Usually I'd get these kind of issues from something going on in my environment, such as, nasal congestion from seasonal allergies or colds, disturbed sleep due to food or drink that didn't agree with me, alcoholic beverages too close to bedtime or too many drinks and slightly inebriation. I have started using an Airsense11 autoset cpap and it has made all the difference in my OSA journey. This machine can be set by my physician's office, cpap supply provider, and I've learned how to make the adjustments as well. It sends data to my doctor once a month and the best thing about this machine is that it is very appropriately named as it will auto adjust the pressure needs as I am sleeping and responds to me so that I get more restful sleep. I can get information on number of events per night, pressure ranges, and so many more data points. I use the nasal pillows and there is also a detachable chin strap for help keeping mouth closed while sleeping. You might try to see about getting a different machine depending on age of current machine and insurance that may cover the cost. My supplier was required to rent the machine to me while insurance monitored my use to decide weather to pay for the entire cost of machine. I was required to have an average nightly use of 6 or more hours to qualify for insurance paying the cost. And I agree with the other response, if your current doctor doesn't seem to involve you in decisions or shows a lack of concern and not listening to you, definitely find a new doctor.