Hi, im a 12 year old girl. I woke up a few days ago and realized I have a jellybean sized lump under my left nipple. I'm really worried it could be cancer or a tomour! It hurts and it's sore and the bump is just on my right side. I've heard that it could be happening because of your boobs developing. But I'm still really worried!! I'm too scared to tell my parents. Is it true that I could be gettin my period soon? I have pubic hairs on my croch. I worried because nobody in my family has got their period early. Usually on high school. Please respond, I'm really scared!!!