Since you're not quite 13 yet, you're probably overreacting to your situation which, believe it or not, is a sign that your body is starting to change (you didn't worry about this stuff when you were 10, right?). As you enter puberty, female hormones make your thoughts and emotions change, which is a sign that your body is preparing for physical changes. So it sounds like you're right on schedule. Many girls don't get their periods until they're 14 or 15 and breast development takes place between the ages (on average) of 12 - 19. So sit back and relax, you are completely normal, your body is starting to produce its own estrogen so you don't need any pills for that. Good luck!
My niece is about to be 13 as well, and she hasn't started either. She has symptoms, but that could also just be being a teenager! However, her mother thinks it could be because of the anti seisure medication she has to take. Do you take any medications? If not, then I'm sure you are fine, just hang in there, it will hit you before you know it! (Then you'll wish it never came!)
its nothing at all. your not even a teenager yet. not all people develop at the same time. dont try and get pills just so you can grow up! be happy you dont have a period yet. once it comes ur stuck and it hurts really bad sometimes, cramps are horrible. and as for the boobs.....when mine first really grew EVERYTHING seemed to be hitting them. balls, fists ugh and that hurt so bad. they also hurt because they were growing, and the hair. most teenagers dont even want hair down there! I shave (not all). and a lot of girls just shave it right off.
dont worry about it. give it time.