What grade?

I initially had a positive HER2 test from biopsy, but after surgery, it was equivocal and then with further testing, negative. I was told that the DCIS part of my cancer was more likely to be positive.

I think it really helps to get a second or even third opinion. My second opinion MS commented on how well she knew my first opinion doc, so I got a third opinion! There may also be a tumor board that can give their recommendation.

Especially with a mastectomy done (any radiation?) there may be options. I really don't know. But I would ask doctors what your options are and what they recommend, and hearing it from more than one doc can help you feel committed to your treatment and/or feel reassured about your choice.