I had stage 1/2 ER positive breast cancer in my left breast 18 months ago. I had lumpectomy and radiotherapy and have been taking Tanoxifen since, my lymph nodes were clear. My genetic testing for a return was a low score. I am 49. I have just found a small hard lump in my right breast just below the aerola. It is quite deep so I can’t tell if it’s fixed or mobile but possibly some movement. It is very firm though. I’m really scared and wondered if the breast cancer may have come on that side?