I am so sorry to hear about your difficulties.
I thought of a couple of possibilities. Maybe you could google disability attorneys and contact them to see if they will take your case either pro bono or pay after a win. Even if they turn you down, they might be able to steer you to another source of help. There are kind people out there...Maybe, a faith-based law school might have someone to help you?

Maybe someone in your local government/mayor's office, or a state representative's office could help. I'm not sure about the structure of Texas government. Heck, maybe move to another state that treats its old people better.

Or maybe, the local librarian in the reference section could help you get some leads. It's been a long time since I've spoken with a reference librarian, but in the past the ones I've consulted have been doggedly determined to find an answer to my problem. They always seemed thrilled that someone actually asked them for help.

Maybe one of these possibilities will work for you. It sounds like kind of hard work to me, with low energy and everything so hard to accomplish...but maybe just one phone call would give you some results.

Prayed for you! Wishing you strength and peace and anything else you need!!