About a month ago i noticed a single white lump on my breast. It sometimes tingles and itches and has not gone away, if anything it has gotten bigger. My mom is making me a doctors apt. but I am nervous it could be breast cancer. What do you think? Im only a teenager and I don't know if breast cancer runs in my family. What do you think it could be? Could it hurt me? How could it have occured? Please tell me all you know about what I just described.