My right nipple has been pretty sore since the 15th and my period is due the 25th but possible the 27th every month it pushes back about two days. Usually my breasts get sore but this is weird for me because its just my right nipple my husband and I have been trying for kids but its taking a while i guess we both got checked out and the doctos said were fine. I just never had just one sore nipple so im confused.