Unfourtunatly we lost :( But I am so proud of those boys!! :D
Anyways, on to your question!
Don't you worry about it at all! Your friends' bodies are just growing a tad faster than yours, and that's okay!
Your er, chest (lol I don't wanna say it online :p) might grow soon, it might not. It is different for everyone! I'm 15, going to be 16, and my chest is on the smaller size. It's a bit nicer than bigger sizes, though- apparently, your back can really hurt from being big-chested. Be happy nothing has happend yet!
As for your period, don't sweat it. You may not get it until high school. It really depends on certain factors, like your age and activity. I got mine when I was 9 (I was VERY early!), probably because I wasn't as active I am now. My friend has been very active her entire life, so she just got hers last fall at the ripe old age of 15. :p Jojo is also right- periods are a PAIN! I hate it hate it hate it! There are so many things you can't do when you are on your period, and products are kind of expensive :/ And for some people, it hurts. I'm lucky enough to not really feel it.
Anyways, Phoniex, you have nothing to worry about! Savour your youth!! Best of luck :)