Hi, I Am A Breast Cancer Survivor And Have Had

Hi, I am a breast cancer survivor and have had a mastectomy on my left breast 8 yrs ago. They have been monitoring an area that they say is an active lymph node at 9 oclock on my right side where I had reconstructive surgery on it 8 yrs ago too. The Dr has to review past with current mammo readings but have not received them as of yet. Just concerned that it may be a tumor instead of a lymph node. Any suggestions?