If you went in for a sonogram and you still are experiencing pain, I would most definitely get a second opinion. I know of someone who trusted the first opinion and it wasn't accurate. As women we always need to know all of our options, and getting a second opinion might not only ease your worries but it can also save your life. If I were in your position, that's exactly what I would do. Breast pain is scary...please take the time to seek a 2nd opinion. Be well. Good luck to you.