Anyone?

Has anyone experienced pain in one of their breasts? I’ve been to the doctor, everything is fine. One of my boobs has always been harder and bigger than the other. I know this is normal. Sometimes it feels like the pain is going into my arm. It’s sort of sharp. Just before my period starts, it’s worse but I finished my period 2 weeks ago. I was diagnosed with costochondritis about half a year ago so I’m just curious as the ribs are located where the breasts are.