If she's still being this bad, and you're still feeling that much hostility from her, it might be time to leave that environment for the long term and cut ties with her. Even as painful as that may be to do it might be the best option, because if she's really not getting any better, as much as I'd hate to say it, she might not ever get any better. Some people just don't change, sad as that is...
But honestly, it might be best to move on and out anyways before something more serious happens, because after all, if she's threatened you before, it's probably unwise to risk her following through on such threats if she might get worse than she already is. Besides, even if she never follows through on her threats, no one needs that kind of negativity in their life in the first place. If dealing with her makes you this unhappy, or her words/actions make you fearful of her, then leave and go somewhere else where you won't have to deal with her, and you can ensure your safety.
I know she's your mother, and I know it's a hard thing to consider, but this is the best advice I can think to give...