I had a mammogram done a few weeks ago. I am having excruciating pain in my right breast. It hurts when I move, or lie down to reach up any movement or touch of that breast and It makes me sick to my stomach. I have had a kind of loss of appetite. I got a callback and the person who did my mammogram saw some images, so they have scheduled me to have an ultrasound done. I am scared, but also in tremendous pain. What could this be?