hello. about 3 weeks ago i noticed a white, round, hard pimple-like thing on my right nipple, right in the center of the nipple itself, not the areola. it is only noticeable when my nipple is hard, and then it looks like a white round ball in the center of the nipple. it doesn't hurt, there is no discharge, and there havent been changes in size/appearance since it started. I am 26, family history of breast cancer. i am also on birth control.