Gone case already, my advice is for you to dump her before she does that to you. It's a soon to happen case.

People like to do this to their partner when they don't have the balls to speak and ask for a breakup with their partner, they pretend that you did wrong and argue with you. In the end they go hiding/blocking/trash talk about you behind another dude and surprisingly that dude turns out to be her next bf.

I've been there before. I saw it with my own eyes, confronted her and I just can't believe the ugly words that were hurled at me, it literally felt like she spat on my face.

Just forget it bro, not worth it any more. Even if she accept you back, it is just wasting your time. You are better off with someone else.