Sorry you're in this tough situation ((dolphinlover8)). Are you still a minor and is your dad paying child support? I really think you should move in with your grandmother and if there's child support involved your mother shouldn't be receiving this if you move out. Is your grandmother your dads mom? You should tell your grandmother and its doesn't matter if your mother doesn't like it. She shouldn't allow him to treat you so disrespectfully or swear at you. If she doesn't like you telling then she should let this happen.

Good for you in sticking up for yourself and I feel you're better off with your grandmother. This abuse could end up escalating and if you're in school you should also tell them so they can put for grandmother as a contact person. Who pays for your therapy?