I didn't get boobs till tenth grade. And acne is normal when you get your period. Don't worry! :)
I did not fully develop until after 20 years old. My breast also took a huge growth spirt after age 50. I was totally shocked that this would happen so late in life. You have plenty of time my dear!!
zoobie55
personally I wouldn't worry about this. If it worries you to the point of restlessness, it never hurts to see your GP. I was an A cup my ENTIRE life, with, without before and after period I have never had breasts. Although no one in my family does either. Honestly it really is true that some people dont develop breasts until even later than you, if you are getting acne and other hormonal things around your period then it sounds to me like your hormones are infact working. Again I really wouldnt worry about that at all, but if you are worried you should see your doctor to ease your mind : )