Sore breast question

Hi ladies, so I have a confusing symptom.

I have sore breast and my period is in 10 days. I've never experienced this as a premenstrual symptom or with my last 2 pregnancies and I stopped breast feeding at 5 months, my son is now 10 months.

So have you guys experienced sore breast for any other reasons? I think it's strange and I don't think I'm pregnant 🙃. Please share your thoughts.