Whoa just checking on you? What do you mean the CPAP doesn't help? Do you still have tons of apneas?
I too have underbite and took cpap and though the sleep study and my machine say less than .5 AHI, I still slept very poorly but had no way to explain it and doctors essentially gave up on me. But I am working on braces and should be ready for surgery in summer, but they aren't sure that's why I still can't sleept.