My heart goes out to you. It must be a kind of hell to see your daughter suffering so. I'm so sorry that I haven't any answers for you. I've never dealt with this problem. The only thing I can think of is to put her in the hospital and keep her there until she stabilizes. I'm not sure that is the right thing or not. I don't think you can help her by yourself. She really sounds like she needs professional help. These are not easy symptoms you are describing. Maybe you should see someone yourself.You also need help coping. Maybe if you see a therapist you can get the strength and direction you need.
I send hopeful thoughts your way