come unhinged
1. To become mentally unbalanced, disturbed, or confused. After my friend's suicide, I came a little unhinged for a few months. Because I'd stayed up all night to finish my paper, I was worried I might come unhinged in class.
2. To be angered to such a degree as to be or seem mentally unbalanced or insane. Mom came totally unhinged when she saw what I did to the car.