Doc, Sorry you are dealing with this but I think you are coping with this turmoil the best you can. Hold the line. You are closer now to having your marriage back than you realize(if that is still what you want). Frankly, I still get the impression that you do. I also think you are pissed at yourself because in spite of this BS, you do still want your marriage. But maybe I am over reading your posts.
Again, I urge you not to make any major decisions right now. Cover your backside to be sure, including consulting with an attorney(or two) but try to give yourself some time to think. Listen to your rationality, your gut and your spirituallity.
I am a bit concerned she may try to provoke you into being physical yourself. If she comes at you again, calmly take our your IPhone and start video recording her actions. State the following words, "I am recording your actions."