Soreness has nothing to do with cancer, Annie. Some of us had soreness, others did not. The doctors will say it is a good sign if it hurts or moves....while it may predict a more likely scenario, nothing is for sure until they examine the cells. Usually they do a mammogram and ultrasound first to get a good look, but a biopsy is the way to go. Just don't let them dismiss you because it hurts or moves.....and keep in mind that 80% of breast lumps are benign. Hope yours is too.