beside yourself

Also found in: Wikipedia.

beside (oneself)

Very shocked or distraught. I was beside myself when I found out I'd been rejected from my first-choice school. Honestly, we've all been beside ourselves since the funeral.

beside yourself

overcome with worry, grief, or anger; distraught.

beˈside yourself (with something)

unable to control yourself because of the strength of emotion you are feeling: He was beside himself with rage when he found out what she’d done.