I agree 100% that you need advice and answers, but there are so many variables that only you know what is the best course.
If I understand this so far, this is what we have:
1. You are a SAHM with no income;
2. You have filed for a divorce;
The question now is what to do about the house, school, etc.
House:
1. House - you cannot afford to live there without your WH;
2. If he lives there he will get a roommate to help cover the mtg.
3. If you all live there, can he then cover the mortgage?
School:
Is your daughter graduating from this school? If not, then it's a moot point - she will have to switch now or switch next year.
If there is the slightest chance that you will R, then you do not want to be moving the kids from school to school
Foreclosure
Do you have any equity in this house? If so, you may want to put it on the market and sell it before the bank forecloses.
If you don't have much equity, then forget it, let the bank have it. It takes many many months to get someone out of their house on a foreclosure. You could live there for close to a year without paying any mortgage before you get evicted.
If you divorce, does your husband make enough to pay child support and maintenance so that you can live? Any child support you do get, will be for 3 children, but in 2 short years, one of those children will be 18 and CS will be down to 2 kids.