Hi i want to answer this one but have a question first. what category would a psychologist come under? they arent as highly trained as a psychiatrist and cant prescribe meds but they are more highly trained than a counsellor or therapist as they have a degree in psychology. I have been told that the only person who can be certain that they are making a correct diagnosis is a psychiatrist not a psychologist. My Psychologist didnt say this but told me she thought i almost definitely had PTSD. Maybe my problem in not being sure which category a psychologist would come under is becasue there psychologists only exist in the Europe? Not sure.