You are going thru a heck of a lot of changes right now, BA.
Adjusting, happy, guilty,letting go, falling in love (or at least having fun with a fun person!) mad about having to do so much for the kids--it all has to be a big emotional stew, and I have to bet that's normal.
Maybe the most important thing for you, Jo, the kids--is to remember all the work you have done along the way. Be honest. Be open. Acknowledge your feelings and what you need/can do/can't do.