Hi Thelma,
Like you I had lumpectomy then radiotherapy first in about 2012. About 6 years after that my mammogram, like yours, seemed to be inconclusive. Think I had a repeat mammogram then MRI, without a particular issue being identified. I was a bit sick of being poked and prodded so chose to leave it until the next routine mammogram, thinking any issue would declare itself by then. And it did! By the time of the next mammogram the scar site was puckering, so of course a biopsy was then done, and a cancer of a different type found! Then it was chemotherapy and mastectomy. I remain well and thankful that once the problem was identified I received very good treatment. All I can say is chase it up if you are concerned, and be sure to get notified about results. There was some confusion with me over whether the GP or the hospital clinic were following up with the biopsy results. Best of wishes to you
Heather