Hiya, I was diagnosed by a psychiatrist. I was firstly had an appointment with my gp who asked me multiple questions regarding my medical history and mental health history etc. They then decided it was right to refer me to my local Community mental health team who then, made an assessment and referred me to speak to a psychiatrist who then, did another assessment then diagnosed me with Borderline Personality Disorder, which has its very own challenges in terms of my day to day life but, I am doing much better now. If you have any other questions, Happy to listen. Take good care of yourself, you matter! ❤️