You say you're her caregiver. What state is she in, if you must care for for her? Do you have power of attorney? If she's out of control with these screaming attacks directed at you, at some point whether she "wants" to see a doctor must be set aside in order to find out what the heck is going on with her.

As a caregiver, we alway come to this most awful choice. I was lucky ... a neighbor served as a buddy and my dad would accompany him. Like kids paired off for the lunchroom, I guess, but it worked & I just faded away