I just want to say hello. I am pretty overwhelmed right now. I have been struggling to figure out what is wrong with me for 20 years now. I have had so many different diagnoses, meds, therapists, etc, but nobody ever really understanding what I am experiencing or really helping me. I have heard the terms derealization and depersonalization and was told I was just having that from PTSD. I still felt like this wasn't enough to describe it. Finally today, I just typed into google, "What is the mental illness where you feel like you are on a bad acid trip that never ends?" And, I found an article about HPPD. Never heard about this in my entire life, but I have read much already and really feel this is my experience.