My nipple is extremely sore, and I think I feel a lump...but I have fibrocystic disease, so can't be sure. I may have slept on it wrong, but I'm worried. Do these sound like signs of a cancer No difference in appearance of breast whatsoever or nipple. I am scheduling an ultrasound. I had one 2 years ago. I am 70-years-old and a woman. I have atrial fibrillation and definitely don't need more problems. Please give me some advice. Does this sound like cancer?