to lose one's mind
Tienes que ser cuidadoso de no perder la cabeza.
You have to be careful not to lose your mind.
En tiempos de guerra lo principal es no perder la cabeza.
In times of war, the main thing is not to lose your head.
— Cuando pasan las cigüeñas (1957)
Me estoy controlando para no perder la cabeza.
I'm keeping myself in check so I don't lose my mind.
You made me lose my mind.