What is another word for was beside oneself?
Pronunciation: [wɒz bɪsˌa͡ɪd wɒnsˈɛlf] (IPA) 
The phrase "was beside oneself" suggests extreme emotional distress, where one's thoughts and feelings are so overwhelming that they become almost uncontrollable. There are many synonyms that can convey this state of mind, including "was in a frenzy," "was in a state of panic," "was losing one's mind," "was out of control," and "was beside oneself with grief or anger." Other options might include "was in a state of hysteria," "was distraught," "was beside oneself with anxiety," and "was worked up." These phrases all suggest a state of emotional turmoil, where the individual feels overwhelmed and unable to manage their thoughts and feelings.
