Have you tried ...
Mike: I know this is just one bit of anecdotal info that may not be worth a plug nickle, but... My Honey used to have chronic back pain, on and off for years. Used to get shots for it and everything. Until... one day I was adamant that we get a new mattress set and, Miracle Cure! He hasn't been bothered by back pain since. I, on the other hand, don't sleep as well on this bed as I did on the last one, but if it cures what ails him, I love it.
Your mileage may vary. Hope you feel better soon.