I am 28 years old. I just found a lump in my right breast almost right under my nipple. It is about the size of the tip of my index finger. When I touch it it moves around and it is hard to the touch, a bit sensitive when I put pressure on it. I heard that lumpiness in breasts is common close to your monthly period, but I had my period over two weeks ago. Is this something I should worry about? Should I go to a doctor and have it checked out? Or is this just a silly concern?