Hello again. I see so many familiar names and faces an regretfully, so many new ones as well.
Roughly 2.5 years ago i did a sleep study and was diagnosed with obstructed sleep apnea and to my amazement, my attacks went from 4-5 a day to zero! i continued with the D3 regimen as it has always been quite effective. Sadly, the Devil jumped on my back again about two weeks ago and we've been dancing 1-2 times a day since. the severity seems not to be quite as bad and I did get a couple days with no attacks. Could this be because I have O2 attached to my CPAP?
I will say, to all the newbies or fairly new, you are most definitely in the right  places. Through the years, my AWESOME CH family has gotten me through many a Dark time and i am forever grateful to have them. Pay attention and as hard asit sounds, be patient, we'll get through this together.

PF sorry to hear of your regression.  My story is similar to yours; since my Apnea diagnosis and treatment (Bipap) I have been CH free for 5 years now.  Do you track your AHI on your machine?  Apnea can worsen as we age or gain weight and sometimes a pressure adjustment is in order.  My Neuro has ratcheted me up twice when my AHI started to rise, and my events are again less than 1/hour.  I do not use oxygen, just the BIPAP.