I think I have a similar diagnosis. Have taken anastrozole for 8 months now, 4+ more years at least. I did notice more joint pain with anastrozole plus taking fosamax for bones for two years. Heard an oncologist recommend turmeric for the joint pain. Now taking 1000 mg/ day turmeric and it helps especially with arthritis in hands. Also am mindful of not doing any handwork for too long a time. Maybe a different AI might help. Good luck.