It turns out I am really good at not bothering to breathe while I am asleep, and so I am also really good at getting my blood oxygen level significantly lower than it should be.  Yay me!  Sleep time is not the only time I have breathing problems, but the problems are worse at night. So, I will be getting some equipment to help counter the effects of severe sleep apnea.  I think I will be writing some blog posts to describe the process and my progress.  Maybe it will help somebody else.