It's possible that you may experience asymmetrical breast development, but it's relatively rare for it to be very pronounced even though it's relatively common to have different sized right and left breasts. Mine hurt like crazy for months aft starting HRT, and have recently begun hurting again. Apparently it's pretty normal, and what you've described sounds like the budding stage. If there's any discharge or if the pain becomes more pronounced or remains only with the one breast for over a month then I'd suggest talking to your endocrinologist about it. You may have to get a breast exam as well as some other tests in case you have any of the more serious bad symptoms.
I'm not a doctor, so if you get worried you should definitely consult one. Other than that, your case sounds a lot like my own experience [emoji6]
Hugs,
- Katie
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