Does the "out of one's head" is commonly used compare to "out of mind"?
Yes, in this case, "out of my mind" and "out of my head" are used to express similar meanings, i.e. having lost control of one's mental faculties (acting in a "crazy" or abnormal way). Ex: I must be out of my mind, I just spent a thousand dollars on drinks at the club. Ex: Are you out of your mind? You almost walked onto a highway!
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