I am 32, I have had the Mirena IUD in for over three years and I am positive that I am NOT pregnant. Two months ago during my period I noticed some sensitivity in my right breast. I thought it was just the usual PMS symptom or that one of my daughters had elbowed me in that breast while we were playing. Then this month, my right breast again began hurting. As I examined my breast I noticed it was only sore off to the right side of the nipple so I checked to see if I had any discharge, and instead of a discharge, milk came out. I understand that breasts make milk long after weaning your kids from breastfeeding, but that has been a long time ago and there has not been any milk up until this period. WHAT is going on? Could it be hormonal or a symptom of the Mirena?