I have just come back from a visit to a new sleep medicine doctor. I went for a second opinion but also thinking of transferring my care to her, and she was much more thorough than my previous provider, so I plan to transfer the care to her. She thinks excessive sleep requirement is due to mismanaged sleep apnea, i.e. I am using a wrong machine and also on incorrect settings. So now an in-depth sleep study will be on Oct 30 and then she will read it and likely prescribe a new machine, which I will then probably get my late November. She says that I will be very happy with it. I hope this means a positive change for me.