Omg. Very sorry to hear this but hopefully, you will have some peace and it won't be a messy divorce. Do you know a good lawyer? I know from a friend who went through this and she was able to stay in her house and bought him out. I'm sure you can too. Especially, you run your business from home.
Regarding running a day home while going through divorce, I would absolutely carry on doing it. It will take your mind off at least a bit. If you can take a week or two to get your head around. If you think you are not fit to look after kids find an assistance to help you for a while. That is what I would do.
I can see you are also from Calgary. Let me know if you need/want to talk.
Cocoon