My symptoms are similar to yours, if not quite so bad. I can’t walk more than about 50 yards, or stand for more than 10-15 minutes. I have tried for disability after my physical issues made me quit my job (after a couple of decades being a teacher for the same school district). I moved back in with my parents. Sucks to be in my 50s and stuck like this, but at least I have a roof over my head. I’m in north OC. There is zero help until you run out of all options and all money. It’s really fucked up. Good luck.