Finding Myself

I don't know who I am. I have no memory of my past, or even my name. All I do know, is that I am a wizard. I woke up one day in an alley. I had no memories, all I had was a wand and a piece of paper that had "Hogwarts School of Witchcraft and Wizardry" scribbled messily on it. As the only clue I had as to who I was, I decided I'd get in—no matter what.(OC is an animagus)(5th movie)