I can see you are trying so hard to work out that THE problem was and why no reply and and and and ad infinitum.
Money, PPD and any of a million of other things could be the answer. You'll never know until the day she truthfully tells you. Stop banging your head on the wall - it'll make you dizzy.
My W gave me a whole list of things when she left. Since then all the old stuff has gone. It has come down to just one thing - she thought I wasn't showing her enough respect. Not true but it is in her reality.
Communication: My W did the same thing. No replies apart from a couple that said "and it's still all about you" etc. Then silence. Black hole. This has been getting better in my case - text messages, answering phone calls and lately meetings (keep up with the news on my thread in Newcomers Rays of Hope) so I can only hope it'll happen for you.
It'll happen when it happens. Give her space and try not to worry. As other people here say - she is thinking about this just as much as you are. She's in processing mode. Leave her buttons alone and give her time. You spend the time sorting yourself out.
And stop overanalyzing things. Google in this case is NOT your friend
Last thing - roping other people in may be counterproductive at this stage. My W was absolutely positive that she was right and nobody would change that stance. The last thing she needs at the moment is pressure.
