I'm so sorry she's having a rant this morning. I know the things she's saying are hurtful, but please do not take them personally. If she's not happy, then she should be the one to leave...whatever you do, do not leave if she demands that you do so.
Leave her be and go on w/your day. She is acting out like a 2 yr old.
Take care of yourself and your children.
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.