My chest is incredibly painful, I can't wear bras anymore, I'm resorti...

My chest is incredibly painful, I can't wear bras anymore, I'm resorting to sports tops. I nursed my older child for a long time, and when it came to breastfeeding, I was scared, seeing how some friends suffered, so I didn't do anything, well, my milk hasn't disappeared yet, there's barely any left, but before I used to drink beer like it was water, and immediately got a milk surge. I've been seeing a doctor for a long time, she said nothing serious ??‍♀️. Now I think maybe that's why my chest hurts so much. I understand pregnancy, everyone goes through it, but it feels like there are mice living in there.