I can really relate to you, chatterbox1607. I'm nearly 16, pretty flat chested, and only started my periods late last year. Part of my problem was weight. A woman has to be a certain weight for her menstrual cycle to kick in. I cannot tell your weight through a computer screen, obviously, so thats just something to consider. I was very thin, with a bad diet. As soon as I gained some weight, and began to eat a healthy balanced diet, nature took over. If you are really that worried about the period side of things, go and see a doctor. It will put your mind at rest.
As for the boobs, I see why you get upset. I'm a aa-cup, and so often feel self conscious about going out, especailly around guys. But, at the end of the day, we get given what we're given. And I know that that sometimes sucks, but we can't change it. Some people are just naturally small chested. Like me. I'm slowly learning to accept that I'll never be a double D, but that doesn't mean my life will be worse off. Besides, look at the catwalk models. Whilst I don't agree with the whole anorexic thing they seem to have going on, they are nearly all flat chested with a boy like frame, and look how successful and lusted after they are! This may not help you feel better right now, but just look around. Everyone is different. I have a problem with my chest. My best friend has a problem with her bum. My mum has stomach issues. There are short people, large people, thin people, tall people and a whole manner of other people on this earth, and the sooner we learn to accept that everyone is different, but still equal, the sooner this place will be better to live on.
I hope I've kind of helped. If you ever feel down, PM me.
Lauren. x