Awww man!! I'm so sorry brother Dan.
I agree with the ones who have said to give it some time. It's a shock to her right now, but when she sees your still that great man she loves and married she'll be back.
You both have your lovely children to think about. I think once she stops thinking about how you not being a JW will effect her..she'll wake up to how it will effect her and the children to not have a husband and father around :(
I wish you well.