I would suggest asking the doctor who ordered your latest mammo for a referral for a consult with a breast specialist/breast surgeon.
That would give you another opinion about whether there is any indication for a biopsy, as well as an opportunity to discuss your concerns with a specialist in breast issues.
Best wishes,
bb.
How and who do I push about getting a biopsy?
Although it would be nice to have a definite "yes" or "no," that's rare when discussing microcalcs.
However, even though the difference in technique between your 2009 and more recent mammograms did not permit a direct comparison that would allow the radiologist to definitely conclude the calcifications are stable, the s/he did not see anything suspicious enough to label your findings as "BI-RADS 4, Biopsy recommended."
With a "BI-RADS 3, Probably benign," it is common just to recommend follow-up imaging after 6 months.
However, it is your body, so if you're not comfortable with this, you could get a second opinion from a different radiology practice, or press for a biopsy.
Best wishes,
bluebutterfly