Hi

How do you respond when she's being abusive, physically or verbally? Do you stay and endure or do you exit the situation?
When you feel like you're struggling to remind yourself who you are, could you go out for a 30 min walk. Maybe just doing some self care would bring you back on track. Maybe you don't need to think yourself back to knowing who you are (ruminate), maybe that happens automatically if you have some quality time for yourself.