Boy, that sucks. I would go to HR and discuss the challenges you are having, but don’t mention that it is ADHD related. I have found that once an inflexible person feels irritated by your behavior it’s hard to go back. Perhaps, your that was supportive could provide testimony for your behavior change. Skip the knitting, that isn’t work-related. Use crayons instead. I once spoke to Paul Ofella, the founder of Kinko’s about his distractibility during meetings. He reported that he found success with a softball in his had. Widgets might work great too. Good luck. I have been there too.