This isn't really cancer. I had sore breasts for 3 weeks. I thought caffine so I completely removed it from my diet. Still hurts, thought maybe my period, but for 3 weeks I don't think it would last that long (I had a hysterectomy years ago, so I never really know when it is coming). I just need to know why they would hurt so much and so badly, it is almost constant and sometimes it is so intense it brings tears to my eyes.