[solome]

  .........but it seems to only effect one breast. Did anything like that happen to you?

no. i'm pretty sure that's an individual thing. no one has perfect symmetry ..sometimes, it's obvious to others, sometimes, not so much.
with me, my left breast is a bit smaller but has the larger nipple. both areola's are about the same. i pay a bit more attention to the
smaller breast with massage ...others have noogled more on their smaller breast. btw, our faces aren't usually symmetrical, either
  ....nor our hips, nor our feet. actually, i think symmetry is atypical.