I don't want to belittle your health issues, but we each deal with the things life has turned up, and we certainly don't know how long we are going to last. When I was at uni, one of my friends was very sick, and had bronchiectasis (amongst other things). One day, several other friends came back from a class where the lecturer had held up a bottle with a lung in it from someone who also had bronchiectasis, and said that this person had died at 25, and that normally someone with the disease died younger. They were all in shock, and treated Ian differently after that. I only saw Ian a few times after uni, but I know he was still living when he was in his 40s. Several other friends were perfectly healthy, but died well before Ian, one in his early 20s while kayaking.
As we age, we all find ourselves debilitated in some ways. As a somewhat trivial example, I have to change my glasses constantly because even multifocals don't cover the entire range, and it is so frustrating. I think it is worth reviewing the things that are important to you and having alternatives. After a traffic accident, I had whiplash for three years, and couldn't do hand embroidery (which was one of my favourite things until then), but I found that I could do machine embroidery, and after a couple of years (while I still had whiplash), I was asked to teach machine embroidery, which gave me a side hassle for a number of years. It seemed to me that one path had closed but another had opened, since I would never have become so good at machine embroidery if I hadn't had the whiplash.