My wife is a side sleeper, and the pillow is very important. You need the right pillow to keep your head level with the rest of your spine. I sleep on my back often without a pillow, or on my left side with a pillow.
… duplicate content removed from here…
Anyway, a different kind of suggestion for those with a spinal injury… I wish you well in your search.
Note added by Phoenix: I removed the duplicate content in this post as it did not have relevance to this discusssion in progress See post #8here and Post # 5 & #6 here