Hi OP, I'm hoping you're managing to get some sleep now but I'm here if you're still up and want to talk. I've only just found your thread but just read the whole thing, I'm so sorry you're having such a shit time of it.
I'm really worried about your leg, is there a different GP surgery in your area you could swap to because yours sound utterly useless? If they really can't do anything for you medically they should at least be signposting sources of practical help for you so you can get around and take care of your home and family. I would second a pp's suggestion to see a chiropractor but I know money is an issue, you should definitely go back to your physio and tell them you can't physically do the exercises they've given you though. You do unfortunately have to push for every bit of help these days and I know that's hard when you're exhausted and in pain but it seems to be the case now that if you don't keep pushing they assume you don't need help.
Someone said upthread about breaking down the things you need to tackle into manageable chunks and I can't help but think everything else would be so much easier if you could get some proper treatment for your leg, or at least decent pain management so that needs to be the first thing you tackle. Chronic pain is so debilitating both physically and mentally it's no wonder you're struggling. I just feel you could do with someone to kick up some fuss on your behalf and get the relevant people to listen, surely your GP should be looking to refer you to a specialist if they really can't do anything to treat your leg?
And then we need to get you some RL support with everything else. Do I remember you saying you suffer with anxiety and depression? Are you under a CPN for that and when did you last see them? Do you still feel that WA could offer any help if exp has gone now? If so its worth searching for local services here www.womensaid.org.uk/domestic-abuse-directory/ rather than the national number which does get very busy, just scroll down the page and there's a function to search for what's available near you.
Other than that the only other people I can think of who may be able to help you are social services. Most of us see them as something to be feared but the way they respond to someone asking for help is generally very different to when they've received a report from elsewhere. Parents asking for help because there's something they're struggling with are not seen as unfit or a danger to their children and I know families who've had invaluable (and non intrusive) help from them when they've needed it. Something to think about at least.
Other than that please keep posting, there's an awful lot of people on this thread wanting to support and help you, please don't feel no one cares because we do, even if we are only online.