Tad, I'm very sorry to hear that your mother had a bad day. I would take what she said about it not being long seriously. I have found it very interesting how people who are in the last stages of life can sense when their time is near. My father advised my mother 7 days prior to his death that he was dying.
I am keeping you and your family in my thoughts and prayers.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.