I have not taken those two together, just Biaxin, but just wanted to mention that my joint pain and fingers' swelling went away when I started to take herbs for Bart. Biaxin by itself did not help the pain or joint swelling. But to be fair, I wasn't long on it because of side effects to my stomach, so I never gave it a chance to do its job.
As a matter of fact, the herbs also helped my wife. She used to wake up with her fingers so swollen that she could not bend them. She would have to go to the bathroom and run them under warm water for her to be able to move them. She is taking the same herbs as me and they fixed her fingers issue.
Oh, and I read your signature paragraph. Your Rheumatologist may be right. I think that it's Bart and not Lyme causing the issue. In either case, you need a new Rheumatologist