get a grip on yourself

get a grip on yourself

or

get a grip

INFORMAL
If you get a grip on yourself or get a grip, you succeed in controlling yourself and your emotions, so that you can deal with a difficult situation. A bit of me was very frightened and I consciously had to get a grip on myself. He told himself to get a grip: he had to stay calm. Note: You can also say that you keep a grip on yourself, meaning that you continue to control yourself and your emotions. He was trying his best to keep a grip on himself.
See also: get, grip, on

get/take a ˈgrip/ˈhold on yourself

(informal) make an effort to control your feelings, especially in a difficult situation: I know you’re nervous, but you must get a grip on yourself. You’re due to go on stage in five minutes.Look, Ben, get a grip, will you? If we panic now, we’ll be finished.
See also: get, grip, hold, on, take