New Lump

Hi Everyone
I had a mastectomy six years ago and then six months of chemo. Missed out on herceptin (long story) but have been well since then. I was 39 at the time of diagnosis. HER2 positiive ER and PR -ve. I now have two small lumps in my other breast. Seeing Doctor on Friday and will obviosly have a mammogram. Has anyone else heard of a new primary so long after the first. Is it likely. Thanks Janet