Hi Pam, I get a lot of pain in and around my left breast, its more of a soreness than a sharp pain but feels like all my muscles have been pulled and they are very sore to touch or press. My rhumatologist told me that the symptoms can sometimes be worse on one side of our bodies for various reasons, so try not to worry. If all tests have come back clear it is more about controlling the pain than anything. I know it can be frustrating as fibro is such an invisible illness but try not to worry, that will make things worse x