I'm sorry that you went through this. I don't completely understand your question. This is really not something that a lawyer on Avvo can answer for you.
You're a an adult so you do have choices. This seems more like a mental health question. If you're currently suicidal I would really suggest some mental health counseling or call a suicide prevention counseling. Some kind of treatment for your depression could really help.
Are you living with your mother? You are an adult. You can move out. It sounds like you need to deal with your emotional issues before you worry about legal issues. You also need to think about what would be your goal in suing your mother. What is the outcome you are seeking?