My sister and I are very prone to getting breast cancer well any cancer since it runs in my family. My grandmother just finished chemo and radiation for her breastbone cancer and when I squeeze my breast i feel a hard thing and it's been the same size for a while but my breast have been hurting a lot because of this thing in my breast and I'm worried. I don't workout very often but when I do I get pain but it's a different pain than this pain I am feeling. I'm 17 and I'm on birth control due to what doctors think could be ovarian cyst. But could I possibly have breast cancer?