I either sleep flat on my back or if I am cold, I roll my pillow up so I can sleep on my side with my neck straight. But, I do much better on my back. If I am on my side and my pillow changes so my head droops, my apnea may start up and I will have stressful dreams. It takes work to learn to sleep in the same position. A hearing and balance specialist said that a neck forward and to the side position is very bad for vertebral artery flow.

An adjustable bed can make it much easier to learn to sleep on your back.