I understand your concern. I was very lucky that I could feel my lump. I try not to think what may have happened if it had been deeper in my breast and unable to be felt.
I have had lengthy discussions with my surgeon and oncologist about why my cancer was not detected on my mammograms. I have repeatedly asked whether mammograms were “worth it” going forward considering they cost me $150 expose me to more radiation and hurt like #&$*@&#!!!
MRIs have not been recommended for me (I’m 4 years post diagnosis) but I recommend that you speak with your doctors about your concerns.