Big deal---and I mean that w/ all respect...many people on this forum have filed multiple times...it's just a piece of paper...that's it...remember you "dont care anyway"- act as if you could care less...you already told her you want to work it out...no need to remind her of that.
We are in the same stage...I myself am contemplating filing...my W is now officially in a R on FB w/ a 41 yo douche-bag divorcee, and she's got the pictures showing MIL's approval (MIL is hugging on OM2) to prove it. She's removed her M name, and moves out this weekend...this is OM2 mind you and she found him 1 week before moving out and that was 2 weeks after OM1...
Screw them!! Act as if, show her some loss, and KNOW that you'll BE OK w/ whatever happens.
Right now she's got everything to regret- walking out on a family and not giving things a real shot...reality/confusion will set in...and you, my friend, will be able to sleep at night!!
Am I cool w/ everything in my sitch...not really, but I'm DONE caring so much. I'm reading books on M/R's, communication, love, spirituality, etc- W is out getting high on BS feelings that will fade anyway!!!!!
It's like when you were in school going to class and studying and your roommate was getting high and sleeping in...they will regret it (and trust me, I was the roommate and yes I regret it).
Good things take work, and effort, and PAIN...you SACRIFICE temporary pleasures and gratification for something bigger and better.
Keep working on you, read, GAL, etc...and don't say a G-D word to her unless its through your L.