For a couple weeks my breasts have been very sore, I thought I pulled a muscle. They are very sore, I am through with menopause and I take a low dosage of prem pro for hot flashes, I still have my uterus my last mammogram was 12/22/2012 I had no problems. What is causing the soreness?

No one online can possible tell you why your breasts are sore. Possibly you need to see what happens if you stop taking prem pro, but that is a question for your prescribing doctor. And we don't know how often you have them examined, or what your other history is.