Marriage with WAW ended, but...

[lost3031]

Your situation sounds so similar to mine that it's scary, except in my case I was the WAW and my H was you. Really, our stories are practically identical.
I can only tell you what my feelings have been. I have always loved my H and I still do, even now that we're divorced. I am full of sadness and am so overcome by second thoughts, wanting to go back home and giving it another try... Even though I too am involved with OM (which also started as an EA before the split and became a PA after) and that R shows great promise, I find myself thinking about my ex and all the dreams we had together... it's all so very sad.
Do I think that my ex and I could ever reconcile? Maybe. It seems absurd that we can still love each other as much as we do and not be together, but the simple fact is that we have changed to a point that we are incompatible in the ways that really matter. His focus is on the future, ignoring the present - my focus is on the present because who knows if the future will ever arrive? This change came about because I almost died last year and my perspective on life completely changed. Suddenly I found myself thinking about all that I was missing out on in the present because my H was so focused on the future. His perspective has not changed, and because of that, our life goals no longer mesh. That's not to say that they never will - and if they do, I will certainly rethink my path in life.
My ex is still my best friend and I hate the thought of that ever changing, although I suppose as we move on it will have to. But to answer what I think was your initial question: when the papers are actually signed and it really hits you that it's final... yes, there is some last minute panic and a LOT of second thoughts. Where is goes from there is anyone's guess...