I'm 19 years old and almost 10 weeks pregnant. Tonight I noticed a small ball in my right breast, that isn't in my left. It's towards the center of my body and I'm very concerned because my grandmother on my mother's side had breast cancer 12 years ago. I've heard the cancer skips a gerneration so I'm freaking out. At my first doctor's appointment, 5 weeks ago, he did a breast exam and didn't find anything out of the ordinary, but still... I know being pregnant can cause changes in the breasts since they are getting bigger and a little sore. This ball is just worrying me. Could this be a pregnancy hormone thing, or something more serious? Tell me what you think! :)