I feel like my depressive thoughts i.e. "Nobody needs you" "You're terrible" "You're useless" aren't actually me. And sometimes when I get really upset, I feel like myself at the time, but when I reflect on it, it's not me. It just feels like someone else did that, not me. And then I start forgetting it in a few days. I can still sorta remember, but not really details. Is this anxiety or a personality disorder?