Sorry to hear about your diagnosis, but happy to see that medication is helping and your keeping up the piano playing and life.
20 years, dam you must be good. Do you play with sheet music, or by ear, or both? Do you have a preferance?
I'm just hoping to get to a point when I can play what I hear, or try to sing!
Keep at it, don't let it get you down and look forward to hearning more from you here!
Happy Playing!