Yeah, that happens to me a lot, too, things just get so twisted up in my mind that I don't remember really who I am or how anything works and it's really very frustrating and not at all fun. But the thing is, I always get better, to some degree, and then I realize that I have not lost myself at all (a fear that always pops up whenever I feel that way), but that my vison was just too clouded by fear and depression to remember, temporarily, anything about myself. Sometimes, forcing myself to remember anything I can about something significant from my past; it doesn't matter if it's as trivial as a drawing I made or a paper I wrote; it helps me to feel that I am someone and that there is significant meaning to my life.