Having a nightmare is a common experience that many people go through. It's a terrifying experience that can leave you feeling anxious and disturbed. Synonyms for the phrase "hadst a nightmare" include had a bad dream, experienced a terrifying dream, suffered from a terrible nightmare, and been haunted by a frightening vision. Whatever you call it, a nightmare can be a traumatic experience that can affect you for days or even weeks. Seeking support and talking about your experience can help you cope and overcome the fear and anxiety caused by the nightmare. Remember, you are not alone and it is okay to seek help when needed.