Yeah the detachment comes and goes at first. I had the same thing, I got so angry that I had to detach or I was going to go insane. Anyway, it lasted a couple weeks, then I started to obsess about how to get her back again. It will be like this for a while, I suppose.
You know my story, so I'm in the same sitch as you with pretty much NC. It is so tough with all of this going on inside you and not being able to let it out or even see how she is reacting to your changes. Do you have a close confidant that isn't involved in the sitch that you can talk to? Maybe someone at work that doesn't know W? It helps me a lot just to talk things through and vent. Careful not to let things out to people that know both of you, that's asking for trouble, unless you know that they are going to be trustworthy. I messed that up a few times.
M:36 W:37 T: 15 M:11 S6 D5 BD: 8/10/14 IDLY: 8/12/14 S: 8/13/14 (she left, I stayed w/ kids) D Mentioned: 10/15/14 Confronted about OM: 10/15/14 EA: ~4/13 PA: ~10/13 She filed: 8/15 (not final)