I suggest you follow-up with you sleep apnea
team, and consider undergoing a formal or in-home sleep apnea
test for more definitive diagnosis. The mandibular advancement device should help, as well as CPAP. The dental device pulls your lower jaw forward, which pulls your tongue forward. If you have a long wait, there are inexpensive low-tech boil and bite models that are sold over the internet for snoring, which does the same thing, but not as well as the formal device.