Not because you want to file, but because you need to know where you stand and what your options are.
I know nothing about the laws in Wisconsin, but you should and need to prepare yourself.
She's Spiraling because things aren't going the ways she thought they would. She wants you to cooperate and go along quietly and you haven't.
She's looking for that control again. That's how you know you're DB'ing and detaching correctly; people don't lose it like that when they're in control.
Is the house in your name, her name, or both? What grounds would she have to file for full custody? These are things you need to know...
Good luck, man! You are capable of great things and you will come out of this the man you want to be and were meant to be!