I assume that you are faithful and that her accusations are unjustified, right?
The key here is constructive dialogue.
You won't achieve anything while you both are on the fighting mode.
So, you need to sit down together at another time and have an in depth chat about what is going on and how this makes you feel.
If she realizes that something is wrong with her attitude and she wants to change, get her this e-book and MP3 audios:
and let her work on it.
What if she does not want to change and believes it is her right to be emotionally abusive?
Well, make it very clear that you are reaching your limit and that solving this is not an option.
Tell her that if she does not shift her behavior, you won't make it as a couple. Then get her this material:
Make her realize that this is a win-win and that she can trust you!