At this point, it is more than a 'bad day'.

[Jarqui]

18. You are doing a pretty good job of articulating what is going on

It appears you can communicate pretty well on a computer.
Nothing wrong with that, is there?

Maybe as part of this brainstorming I was talking about, you should get an assessment of your abilities with your disability
https://mn.gov/deed/job-seekers/disabilities/
Get a 3rd party assessment of what skills you can use and marry those with things you could do and might enjoy doing.

Maybe you could do online support for a music product
Maybe you could help organizations online.
My daughter works from home online helping raise money for victims of the Israel-Gaza war.
Hasn't been the greatest pay but she loves the mission and the people she is working with so much - she's happy.
Maybe a student would help you do online guitar/music classes using that experienced brain of yours.
Or a lecture on your experiences in music that might help others.

Maybe you could team up with some other seniors and help each other - functionally and in developing friendship.

What do you have to lose checking other things or options out?
I know it is hard. But withering away isn't much fun for you or your husband. Might as well put up a fight. A lot of people tend to want to help other people they see in a struggle but trying to make a go of it. They know, you can't help someone who doesn't want to help themselves.

You think you're done. I don't. Suck it up and try to prove yourself wrong. You might surprise yourself.