Seems like you're in a tight spot there. I would try acting and admitting to being clueless to what you supposedly did. Hopefully this will clear things up. Good luck OP!

Yeah, that is typical female-logic and one of the reasons I've given up on women, I just can't stand it. I feel sorry for you, though.

If she can leave you for a reason she doesn't even want to explain, maybe she simply doesn't love you anymore, or not enough for her to care... Or she's simply trying to find a reason to leave you, and either way, she's acting like a child, sorry for you man.

The only thing I can think of that might bring that kind of reaction is checking out other women while she's sitting right in front of you. I know it's instinct, but a lot of women find it infuriating.

There aren't very many things you can to to earn a week of anger and a threat like that - and they'd all be super obvious. At this point, her behaviour is a bigger issue than anything you might have done. A week of anger is way too angry. Claiming that it's worth leaving you over, but not worth actually telling you what it is, is just messed up? That's a pretty abusive way to treat someone.

Technically you never found out what was wrong. Only that you did something, but you already knew that.

Women who mind fuck their partners like this make me ashamed to be female. Id never do this to a guy Im dating and women who do this give the few honest women a bad name. Im wondering if shes not happy anymore and is using this as a reason to seperate. Sorry.

Tell her that unless she reveals your error you will have no choice but to leave her.

Sounds like she's at more fault than you, for not communicating at all.

Communication is a necessity to any good relationship. You may want to consider counseling. Doesn't mean you're giving up or that this means your relationship is really on the rocks. It's just a good way to check in and learn how to be better for one another.