Good luck to you! It could be something else due to having dense breasts, or it could indeed be a malignancy, but even if so, millions of women have survived breast cancer. I was once getting a mammogram and commented to the tech that if I ever learned I had breast cancer, I was tempted not to even bother to fight it. She sat me down and talked to me seriously, saying that she's heard women say this before and it was almost always because they knew someone who had a bad outcome with breast cancer. But that she has done many, many mammograms on women who have only one breast, some from cancers years earlier, and that breast cancer is survivable. Trust your doctors and try not to be frightened. There are a lot of therapies and options and a lot can be done.