Nipple discharge?!

Kylie
Hey everyone! So I have been having nipple
Discharge, it's a tiny bit, about a drop/half a drop. It happens randomly. I ALWAYS have protected sex, always. My period last month was a week late but I got it, I was just under stress. My boyfriend always sucks on my nipples when we have sex (sorry if that's TMI) , and I figured it was just because he always sucks on them that it would just be like as if I were breastfeeding? Like the same stimulation. I honestly don't think I'm pregnant since I've had it for a few months randomly, but he does suck on them often. Could it be a blocked duct? Should I worry? Anyone else have this happen? Thank you so much, just don't feel like being paranoid!