I think it’s come back…

Anything that can stop/ reduce anxiety is worth serious consideration. It’s pretty normal but it’s not fun. Once you get the current problem sorted out, it may be possible to consider what you can do to reduce anxiety. I found anxiety about scans reduced significantly after five years, but that’s still a long time. As @iserbrown suggests, going off a medication can increase anxiety even if it stops unpleasant side effects. Has your oncologist discussed any alternatives? I managed to do a full ten years on Letrozole - some side effects but none of the joint pain type. Best wishes for reassuring results and the future.