@lynnn I had the same problem with sleep. Finally gave up and ended up in the recliner. I think you might be right about nerve regeneration. We were very brave to have this done at our age. But if I had to do it over again, I would. I was not in constant pain like most people but had severe misalighnment which was corrected by the surgry. My Dr. said it would add years to my life. I corrected him and said at my age it would add life to my years! Good luck to you on your recovery!