Just one lone sore "don't even look at it" boob

Kamie
Here's a small back story to get some advice; Mommy to wonderful almost 5 year old, breast fed until 10/11 months and had a small milk supply for almost 2/3 years. 
My stronger boob was my right one when BFing I believe and now it's almost always sore, to the point I don't want my fiancé looking at it wrong (haha) 
Went to the doctor, got blood and last exam and everything came back in the clear. (Wants me to come back in 6 weeks to text iron and pituatary gland function) couldn't find a reason for the soreness of my right breast.
Any of y'all experience this? I am tracking more closely the soreness and when it occurs, currently ovulating so it's sore now. Mostly behind the nipple and bottom of boob.