I would suggest a full body pillow and sleeping with a good quality head and neck pillow that are supporting whether lying on your back or side. Keep a regular pillow handy if you are lying on your stomach.
What has worked for me is lying on my side, but rotated over and forward onto a full body pillow from the chest to the hip. Alternately rolled backward onto the pillow. This position relieves the pressure of lying directly on you side which can distort the spinal column. Vertebral pain for me manifests most strongly lying properly on my back or either side. this would make sense as spinal damage manifests when vertebra shift forward / backward / sideward.
On a slight angle rolled over the full body pillow your spine may shift less and at an angle or direction it is not normally stressed at. This may lower your pain level.
I have also succeeded in sleeping face down on the floor with my head supported at the forehead by my hands, where the thumb and first finger are used to make the letter O as a cradle for my head, which allows a vent space for breathing. My thumbs of that O rest in the bridge of my nose, and the index fingers sit just beyond my front hairline.View Thread