John I had a stroke myself about 10 years ago. Not a huge one but it did leave me with weakness in my left side and my speech was also slurred. This was BEFORE I took the box out of its case again. I was walking unsteady and was off balance for a few weeks.
When I tried playing again, I couldn't believe how bad I was, I couldn't play the most simple tune without making a complete cock-up. Nature & time are the best healers and John, practise as often & as long as you can. IT WILL come back, believe me old mate.
I've a friend in Ontario who might be able to help you. She's discovered she can heal by faith. Drop me a pm & I'll send you her email ad.
Graham