Desirae, you seem to be in a predicament that may be impossible to fix by just a few kinds words from some of us here.
I would approach your local social services.....it's time to get some help, via financial, social care, etc. from the organizations that are created to help people.
All I can add is you must follow your instincts and do what feels right for you first, then worry about the other people in your family next.