Sore Breast

Cathy • Asexual and proud.
My breast are so sore that I'm afraid I'm pregnant. I have had unprotected sex multiple times during these past two weeks including times when I'm supposed to be fertile. 
But I am on the pill! And I take my pill every day from 6:00-7:00 and I've never missed a pill. 
Should I be worried? Does anyone have any idea why my breast are so sore? They are never sore like this ever.