Advice Needed how to figure out what a woman is mad about?

Ignore her, pretend you don't care. Spend time talking to one or two other women if you need to, if you struggle to do this. In my experience what you're going through is called a shit test. It's something females are wired to do to test their partners' abilities to protect children.

My suggestion is to do whatever it takes to stop being so bothered by her behavior. Play it off, play it cool, give yourself the things you need to make her seem smaller than you, not so front and center in your brain. She will get so frustrated that you have better things to do and other women to focus on that she will change her tune completely.