Oh
Yes I am familiar with what you are experiencing. For me it did not start until after I had filed for divorce. Hours and hours of it. Night after night. One of my biggest regrets is not forcing him out at that point. I wasn't strong enough and clear enough but in hindsight those three months caused more emotional damage to me and the kids than all the previous years combined.
Many hugs to you.
Have you consulted a lawyer? I would recommend doing that right away so you have some facts to work with. I know each state is different but for instance - where I live it doesn't matter whose name is on the mortgage. If you are married - both people own the house as far as the courts are concerned.
In my case I filed for divorce and ask for primary custody and primary use of the house. I was granted those without question. They were temporary - in the final divorce he got half the house (even though the mortgage was mine alone) but in the mean time he had to leave and the kids and I stayed. I did that to force him to leave. I didn't even want a divorce at that point. If I'd have called the cops they would have escorted him out of his own house based on those orders. I didn't do it and I should have - even if I'd have done it the next day when all was calm and the kids were gone.
Long story short - consult with a lawyer and find out what your options are. You don't have to do anything or make any decisions but it is always good to know the facts.