The phrase "beside yourself" is often used to describe a feeling of being overwhelmed, frantic, or out of control. However, there are several other ways to convey a similar emotion. One might say they are "frazzled," "flustered," or "frantic." Alternatively, someone might describe themselves as "not in their right mind," or "losing it." Another option is to use terms like "panicked," "hysterical," or "beside their wits." No matter the phrasing, all of these expressions convey a sense of extreme emotional distress or confusion. Choosing the right synonym can help to accurately communicate one's state of mind and evoke a greater sense of empathy from others.