I know this is a couple months old and you may have found a resolution but attacking her back is only feeding the negative vibrations. Spiritually protect yourself by sending HER attacks back, putting barriers up (surrounding yourself with white light) and closing your energy field also ask light beings (guides/angels/whoever) for protection. Habouring anger, resentment or any low energy feelings and thoughts will continue to feed the vibrations but hopefully you will find peace within the situation, forgive your mother, thank the angels for the lesson and the only one your mother will be attacking is herself. We make our agreements for a reason, sometimes we can't understand why we would put ourselves through cruel situations but maybe you came back as your tormentors child to teach her love or for you to learn forgiveness. My father murdered my mother in a past life and in another she was his mother. Doesn't make any sense but we signed up for it lol.