What's going on with my mother?

More than likely, your clinical depression stems from not only your relationship with your mother but her inability to mentor you in a positive way. You need to stay away from her and force yourself to live up to something positive for you and your life. You can make changes. A healthy diet, exercise, a good job. Start with these 3 things and see if your life doesn't turn around. Once you're self-sufficient and doing positive things, your relationship with your mother will be less emotionally charged and significantly better.