I would recommend getting another radiologist to look at last mammogram. I had something suspicious that was double checked a week later and first radiologist said all ok. 6 months later another mammogram and different radiologist recommended biopsy which then showed cancer. Radiologist said it hadn’t changed from first mammogram but now it turned out to be invasive eg left the duct. I cannot help but suspect it would have been in situ 6months earlier. So get another read to make sure. Lumps are not good!