You can find support here Corianne but can get the effective help just from a professional. It's good that you are striving to feel better. I don't think taking over dose is a good idea. Rather you should built courage and consult a therapist. Sometimes our empathy bring us to a point where we forget our identity and began to live in someone else's pain. May be you witnessed any abuse and it affected your mind. Anyhow the professional could identify the reason better.
Keep us informing about your progress Corianne. Wish you good Luck!