Sophie, breast cancer at 16 is very, very, VERY VERY unusual,so statistics are on your side for sure. That said, any changes in your breast (not related to your period - i.e., the changes come and go in synch with your period) should be looked at by a doctor. So try not to be embarrassed; taking care of yourself - ALL of yourself, including your breasts - is simply being amature, responsible woman. Give the doc a call, so you can set your mind at ease, OK? -PJH