Hi tjoe.frank
I am very sorry that your mother is terminally ill. No matter what, she's still your mother and I can imagine how tough this must be for you.
It's clear that you still care for her very much and even moved your family across the country to take care of her. You say that after 9 days she blew up again. What happened exactly? Do you feel like something might have triggered her, perhaps something innocuous that she perceived as a major slight?
We have a workshop here about the BPD behavior known as splitting that you might find insightful:
Splitting refers to a primitive defense mechanism characterized by a polarization of good feelings and bad feelings, of love and hate, of attachment and rejection.
Splitting is a powerful unconscious force that manifests to protect against anxiety. Rather than providing real protection, splitting leads to destructive behavior and turmoil, and the often confused reactions by those who try to help.
... .
Individuals suffering from borderline personality disorders live in an immature psychological world, fueled by certain constitutional vulnerabilities, where they attempt to shield themselves from conflict and anxiety by splitting the world into all good and all bad. Although this produces an sense of psychological safety, in fact, it renders relationships fragile and chaotic and drives away the very people who are so badly needed to provide stability in the borderlines life.
Do you feel like the behavior of 'splitting' fits your mother?
You can read more here:
BPD BEHAVIORS: SplittingBPD poses us with a harsh reality to accept. Accepting that our parent has BPD also means letting go of the loving 'fantasy' parent we never had, likely won't ever have yet still might long for very much. Do you feel like you've been able to let go of the fantasy parent and accept the fact that your mother might never change her behavior?
I'm glad you are reaching out for support here. Many of our members have parents with BPD and will be able to relate to you.
Take care