I woke up this morning with a big lump in my right breast. The lump is as big as a golf ball. It is painful. I had this happened before about a year ago, the lump was in my left breast then and it was way bigger. I figured it was exposure to mold. You see, we rented a home in Missouri and they did not have a good air circulation. As a matter of fact no windows in the bathroom and the exhaust fan was not working. After each shower, the carpet will feel damp. Few days later, a smell of mold (spores) became very strong. That s when the lump appeared. After we vacated the house, few days later the lump subsided and never returned. Will this be the same phenomenon? I am 49 years old, all my mammograms have been normal.mary Or should I see the doctor now?