I have sleep apnea, probably caused by having a big tongue, and did a home sleep test. My AHI was close to 60. I was prescribed a CPAP with a nose-only mask, an

I have sleep apnea, probably caused by having a big tongue, and did a home sleep test. My AHI was close to 60. I was prescribed a CPAP with a nose-only mask, and my AHI went to zero overnight. No issues whatsoever. Maybe try a different CPAP or mask combination if you only tried it with a mask that goes over the mouth.