Joe,
KNow the feeling of constant pain...but mine is hereditary arthritis...least so I'm told.
Peace of mind can go a long way. Sometimes, that is hard to find and only "letting go and letting God" deal with the things we cannot, will make life more tolerable.
Spend quiet time w/ HIM and ask Him to show you what's eating you from the inside, then leave it at the cross and Trust! (Hardest thing I face daily is that simple bit of advice, so it's not that I got it figured out)
Prayers for discernment, strength to "let go" and His peace and healing to rest upon you.
Keep the Son in your eyes!