Hypersomnia, severe sleep apnea

I have a huge problem. I have been diagnosed with severe sleep apnea and hypersomnia. My sleep doctor refuses to prescribe me anything other than cpap because I am on psych meds. They think my psychiatrist should do it. He has in a limited capacity; 200mg modafinil which I think does nothing and 15mg of Ritalin 2x a day. However my psychiatrist is not trained in sleep meds. He doesn't know what the right dose is. Now my sleep doctor wants me off all stimulants. They think the cpap will work fine. It is not! The little Ritalin I sleep off. Idk what to do.