BS”D
Arthritis caused by Lyme disease can be partially or totally reversed but if you had so many tests I would hope that was one of them. But remember doctors are but human and often very subjective in their diagnosis and treatment.
I was prescribed the wrong creams (plural, as in at least 3 different ones) for a very minor skin condition that I called “insurance related dermatitis” because of all the money the group practice I went to made from my insurance company on that nonsense. Then after a year and 50 odd tubes and bottles of incorrect medication I saw another doctor and she prescribed the right one – and the first doctor admitted to me that she did not give me that right off only because she herself is sensitive to it!