Don't beat yourself up over minor setbacks. Everyone has good days and bad. Like you said, refocus and move forward.
I would also not do anything to enable to further the disintegration of your family. If your W wants out, then let her be the one to file, move, etc. You also do not need to pay for her A. Puppy Dog Tails can give you much better advice in this area than I can, but the gist is that anything that she is using to conduct an A is something she should be paying for. This includes her cell phone, gifts to the OM, perfume, lingerie, etc.
You sound really good and healthy for where you are in your sitch. I think it took me about 3 months of separation before the fear disappeared and I started to feel confident in my own skin without my W. Like I sad earlier, we all progress and acclimate at different paces and we will all backslide occasionally.
Keep it up!
Me40 WAW37 M18 T20 S18,14 D13 EA Bomb 6/08 Sep 11/20/08 Ret 08/09 Sep/Filed 11/09