I'm a 40 yr old female. I had a mammogram two weeks ago as a baseline and turning the big 40. It came back negative for malignancies., but said I had dense breast which can hide small abnormalities. My dr and the radiologist says starting now to have one every year. I have occasional pain in my right breast that comes and goes. Not sure if it's realated to periods. My dr said if he keeps up call her in 2 months. Im having it now, my period is due in 1-2 weeks. I usually have the pain on the right side. It nkw I'm having it under nipple and left of nipple and it feels like bruising. Should I be concerned? I rubbed it on something Today and it hurt.