So sorry to hear about your troubles. I have to agree with want2bmarried that it might be time to "go dark" with regard to your xH (at least as much as is possible considering you have children). DBing is a good thing, but there are times you have to protect yourself...and this may be one of them.
I don't recall if you mentioned it in a previous post (I took a quick review and didn't see anything), but do you have relatives nearby (or at least not too distant) that can/will/do support you?
