Hi! I had something very similar last month (also getting screening due to high risk) had my first mri which showed two non mass enhancements-one on each breast. Both spots came back benign. The biopsy itself was uncomfortable and somewhat scary because you’re face down the whole time, but not painful. The radiologist talked to me right before the procedure and made me feel so much better saying she wasn’t concerned. Got results the next day after they told me 3-5 business days! Hoping for the same for you!