In the state I live in, leaving the house puts you at a major disadvantage, especially when it comes to custody of the children. They will actually use the term abandonment of the family and marital home.
DO NOT LEAVE YOUR HOUSE AT THIS TIME.
You need to stay the hell away from her for the time being. Do NOT engage her in any way, and start documenting EVERYTHING.
Do not be afraid to ask your lawyer any questions you may have. Remember he is working for you, you make the final decisions here. Keep a note pad with you, if a question arises, write it down. You have an awful lot going on and it's easy to forget things at times.
Do not be intimidated by all of this either. Lawyers know the law, but they are NOT the law.
