Microcalcifications do occur normally within breast tissue. Only when observed in clusters or certain patterns do they raise concern. Even then they are often found to be benign on biopsy. It has been my experience that anyone with a history of breast cancer does have Diagnostic Mammograms .... that doesn't necessarily mean that you will be given a report before you leave the facility. It only means that a Radiologist is present when the films are done; rather than being read at a later time. They only look at the films but don't dictate a formal report at that time. Keep a positive thought even though the waiting is the WORST !!!
Some data shows Digital mammography demonstrates microcalcifications better especially in breasts with more glandular tissue. The radiologist may have seen more calcifications than on the film mammograms. If they recommended a biopsy they almost certainly would have called your oncologist today, who then would call you to set up the biopsy. As a patient with history of breast cancer, you should be able to have diagnostic mammograms, where they will tell you results before you leave. Try to ask your oncologist to order your mammograms as diagnostic. Good luck.