when you joined, you set your entire DB timeline to when the "dream house" was built. You were going to wait until then to set boundaries, and really start to DB. Now you are skipping all of that and filing for D. I think you were hoping a new house was going to shake your WW out of it and get her to come back to you and the future you both dreamed of.
I think you may want to consider calling your L and telling him to hold off, set boundaries (why are you leaving the MBR? and why is your WW sleeping in there with you?), stop being a H to your WW and fixing her problems, and work on yourself.
Your emotional swings over the last few days show that you are not in the place that would be best for you when you D, so why rush the D? If you D, will you be selling the house? If so, why not start there? Start preparing for your life post M, but don't rush it. Give DB at least a fair shot before then.
M - 9 1/2 years 5/5/16 - Bomb drop - 3 week EA 10/31/16 - We sold house 01/10/18 - D Finalized