I just got my CPAP about 10 days ago. It started out alright... I had 5 days of good readings and an AHI average of about 5.4. And then suddenly it seemed like the machine were attacking me

So I don’t know if something is happening with the machine or if it’s me opening my mouth. My AHIs have gone up to 98. I haven’t been able to reach anyone at Respironics yet (no customer service over the weekend) and I’m out of town today. I’ll try again tomorrow.
My questions are: Would a chin strap help? Is this problem one that should be discussed with the respiratory therapist at the supply store or my doctor? I can’t use it now if I want to actually get some sleep. I believe I was told I had to use it at least 4 hours a night to be compliant with my insurance. Am I going to get dinged?
Thanks for any feedback you can give me