Its the games that are hard to see through... is this divorce for real?
If I remember what you wrote, you said that she has changed so much in 4 weeks, yelling, screaming. She wants time to think, she has said she did not want to work on "us" at that time, but now is talking, but with tension between you.
Next, she is the friendly smiling wife. No divorce papers registered with the court.
The most interesting part is when you told her that you would not allow her to treat you like a door mat. She started to treat you with civility then.
My question for you is this. You said that there have been issues for months, was there one big thing done that drove her over the edge?
Don't answer me specifically if you do not want to disclose your personal business, just think about it. What is her motive? Different things elicit different responses from women. I do not know if there is an easy answer to your question.
Has she ever played mind games with you before?
My hunch is that she is angry, confused, and emotional. Hence the mood swings in the last week or so. If you have been doing the right things as you say, then attribute that to her change around.
Is there someone who knows what is going on that you can ask for insight? Remember the warnings that I made in my prior post about being careful what you do when you ask a third party. Let me know if you need me to quote it for you so you know for sure what I am talking about.
I hope this helps.