Zinnia, it's very cute about your curious kitty.
That's wonderful that you sat down at your keyboard and played. Even better that you did it with your foot down! I have found piano very healing. Not only is it beautiful and a distraction from pain but that intense focus rewires you. Doing something like playing an instrument makes the "hand" portion of your brain spread. I say the less of it focused on pain and your foot the better.
Keep up the good work and thanks for spreading some sunshine.