Hey SunnyD, thanks so much for all the advice. I'm doing my best to take it all to heart. I understand that mode you're talking about ("trying to figure out why and how you could fix it"). So hard not to do that, but I know there's no one I can control but myself.
I also know I have to keep things calm and happy for the kids ... no small matter when a WAH who moves out sends such an in-your-face "bleep you" to the whole family. It doesn't help that money's so tight right now and our living situation will probably have to change soon. One day at a time, I keep telling myself. One day at a time.