Okay so I'm 13 going on 14 at the end of this month I'm in year 9 but I still haven't started my periods I would say most of my class has it may be that I'm the only one, am I different I am also a bit flat chested not completley mind they have grown recently. I am going through puberty as I have pubic hair I just have no breasts and haven't started my peroids yet is this normal? I don't feel normal:(