Lord have mercy! Reading your story really breaks my heart, Lonelyonlyone37. I don't want to get into details since I still maintain the idea that the less personal details you give out about yourself on public forums the better, but I am also physically disabled, so I know a lot from personal experience how people with physical disabilities are often treated. My only suggestion for you outside of prayer and continuing to reach out to others as you can for support is that you look up what official support organizations there are in your area, when it is safe to do so (away from the abusive partner and untrustworthy family). I have made use of various organizations which help me with weekly tasks like going to the grocery store (since I cannot drive; I used to be able to, but it was recommended that I stop some years ago, as my disease progressed), as well as other more long-term things like setting up a savings account,
finding housing and living in it independently, etc. These organizations are all at the county level so far (haven't dealt directly with the government at any higher level in a long time outside of medical re-certifications, which go through the state), so you should start searching online for things like "Independent Living Services _____ (your county name)", as well as looking through the
government listing of federal and state services available to people with disabilities. Getting into any particular program often entails a fair bit of paperwork, but whoever you get in touch with at whatever agencies you pursue should be able to help you with that.
It may be very difficult, but you do not have to live in your current situation or in a shelter. There should be other options for you, though what they are will vary depending on where you live. May God be with you and protect you as you search for a safer, healthier place to be. Coming here was a good first step. I pray that you will be able to continue until you reach a place where you are valued, protected, and loved.