So sorry to hear your story, but it is a comfort to know that we - as a couple - are not alone. I have been a vegetarian for many years, I do eat a little fish. My husband does eat meat, but very seldom. We have eaten organically for many years too and in the summer grow our own veg. Neither of us smoke, and I never have. My husband drinks a little, I drink too much, but mostly because of anxiety. We both keep active. He used to run and has down long distance walks.
Things are harder for him now because he has preipheral neuropathy in his feet. I am a keen gardener. I have physical issues, but I try and keep on top of those. We live in a rural area. As you say I wish we could help others, there is no point to anything otherwise is there? I wish you the very best of luck for the future.