I am a 43 yo women, I had a hysterectomy (left the ovaries) 4 years ago.  Over the last month I started having severe pain in my left armpit that hurt to put my arm down or touch.  The pain is now in my left breast and nipple.  My left breast is swollen, it hurts touch it, have clothes rub on it etc.  The nipple is extremely painful too.  My breast feels very heavy and firm, I can get some relief by hold it up or putting an exercise bra on.  I am concerned because my grandmother had a very aggressive form of breast cancer and needed a radical mastectomy, including surrounding lymph nodes.  I had a neuroma tumor removed from my sciatic nerve in 99.  I feel a density around the areola and some around the outer part of my breast closest to my armpit.  I feel a small bump under an area between my breasts that has been persistent for about the last year.   I had an augmentation in 2003 but have never had any complications.  I also had a lymph node removed from under my right armpit in 98 that was benign.  Should I be concerned?  I appreciate any advice you can give me.  Thank you in advance.