Dear brother/sister, just a few words of encouragement about the healing of the body in the Christian life. As we with chronic pain tend to get easily discouraged at times.
I don't think it is always a fault, or the lack of faith, or an un-confessed and un-repented sin that a believer is not healed.
Some passages in the NT would indicate the same -
"...I left Trophimus, who was ill, at Miletus". 2 Timothy 4:20b