Ok....first....nothing legal has been done so if you want to keep the kids home with you....you have every right to do so.
Second, I told you that you have to get some paperwork going....whether it is for a legal separation or filing for divorce.
Third, get everything in writing....list everything that is yours on paper...make a shopping list right now about the contents of your home.
Lastly....which should be first, seek legal counsel on everything.....use all avenues for a free consultation or whatever the state supplies for free...tell them you don't work...have nine fingers...WHATEVER...but get started on this. Don't sit on it....because it's obviously not going to get any better for you or the kids.