Yes, I do move around at every opportunity. But I used to wake up probably 20-30 times per night and so would change positions a lot. Now, when my AHI is low (like the last 2 nights), I only wake up a handful of times through the night, which means I'm in each particular position a lot longer than I used to be. So that is what is causing the back pain, I believe. Too long in the same position, which I'm not used to.
Regarding the pillow, yes, I sleep on my side 99% of the time and I put a pillow between my knees. When I wake up, I switch to the other side and then back to the original side when I wake up again. I'm not 100% sure that the pillow I'm using between my knees is the right size/thickness, so that's a thought. And I have an adjustable bed (air) and i've thought of experimenting with letting some air out to see if that would help.
Unfortunately with the back pain, after about 6 hours of sleep (really good sleep when my AHI is low, fortunately), my back hurts so much I sometimes have a tough time going back to sleep for a while and other times can't at all. But then within an hour of waking up and walking, my back is fine all day, for the most part.
General Discussion on any topic relating to CPAP and/or Sleep Apnea.