That anxious feeling is terrible...isn't it? For me it's the reminder of being vulnerable - and also a way of recognizing that I still have to work on letting go of things that are out of my control.
From what I've seen happen on this site over the months, for you to bring it up - even just to let her know that you don't want the divorce - could quickly go in an unexpected direction. From all that you've shared here, I'm pretty sure she knows how you feel - and right now, calling her and telling her you don't want the divorce could just push her more toward it. It doesn't make sense, I know, but it just seems to happen that way all too often. What I would suggest is that if she should bring up divorce that's when you mention that it's not what you want, that you prefer to work on things together, but that you respect her decision and you won't stay in her way.
I know that not doing anything and just waiting until Friday comes and goes seems passive - but that's only the case if you don't use that time between now and then for yourself. If your W doesn't know what she wants to do, asking her about it or even talking with her about it could feel like a lot of pressure. I don't have the DB/DR books with me...but I think it would be a good time to go through them again - just to see what jumps out at you this time about achieving a point of being loving and detached - of loving someone enough to be willing to let her go - and knowing that loving in this way can open you up to a very healthy relationship with yourself - and then with the person you love...
In the meantime, keep busy. If you like Sci-Fi - I would highly recommend District 9 - or maybe go to a concert?
Keep reading other people's threads here as well...there's lots to be gained from what others have experienced (what's worked and what's not worked).