As the child of an NPD father, I can't tell you how much better our lives became once my mother finally divorced my father. I wish she had done it years earlier - living with with a narcissist really damaged my sense of what 'normal' behavior is.

I have not been in your situation, but I wonder what your lawyer thinks about you leaving the house for a few days. I am thinking about your husband changing the locks while you are away.

I hope that he just goes away. My experience of narcissists is that many of them prefer to be the dumper rather than the dumpee and will try to make it look as it if is their choice to leave.