Hello and welcome to MedHelp's forums. The first thing to remember is that tests show things to further investigate but it often does not lead to a cancer diagnosis. And when it does, early detection leads to better overall results. We do understand this is a stressful time for you. We are glad you are working with your doctor to determine what these abnormalities mean if anything to your health.
Here is some information on calcifications in the breast. https://www.webmd.com/women/guide/breast-calcification-symptoms-causes-treatments#1. That your calcifications are regional, this means scattered in a large volume. They are more concerning when clustered.
We are glad that you are having your biopsy next week and hope it brings reassuring results. Please do share with us. But know that many women do have this same situation arise and do not receive a diagnosis of cancer. Your doctors are being prudent in your care which is good. We wish you the best.