Winnicott called it a false self. Our true self was not reognized by our primary caretaker, so we dveloped a mask, a false self, to go thru the motions of life. I would say it is similar to dissociation? I see myself in much of what you describe here. Only like i never lost time or anything like that. Still, its like when i walk, im floating -my feet dont really touch the ground, unless its difficult for some reason - then it catches my attention. Its hard to stay in the present moment.