Hey NM, take it easy on yourself. 25 and others can attest I was a basket case for probably 3 months from when I got here, and I got here 4 months into the sitch...
See, you mention about your business. I know that challenge. You gotta dump the emotional crap ASAP! I lost pretty much all my business through this and would have ended up on the streets if it wasn't for my folks and a good friend who had space for me.
Whatever it takes, GET YOUR MIND IN THE GAME, and off your W. There'll be time to lick your wounds off hours and when you aren't with the kids. Your emotional roller coaster should not be your financial downfall and the risk of access to your kids.
again, whatever it takes. Hard, yes... I know...
And good stuff on your last paragraph. Again, that it the stuff that will help you survive.