I have what I believe is similar, but tests ruled out arthritis. I just came off an experiment wherein I avoided all the nightshades, but it didn't seem to help. I walk for 2 mornings, then take one morning off to recuperate - badly needed - and the only real "remedy" I've found is enteric-coated extra-strength acet.
NSAIDS work better, but come with their own problems. As I've had two heart valves replaced because of a Staph infection, they are off the table. It's hard enough to keep in any kind of physical condition even approaching "fitness" when you hit 73, and my body occasionally throws up another roadblock, because I apparently need challenges.
An impairment of some kind to my AV node that approached failure requiring a pacemaker has been the most significant. My resting heart rate was 28 BPM.
Best wishes to you and your own challenges. 
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