Only one sore boob

I am ttc and had sex on my lh surge and a few days before that. I am only almost 6 days past ovulation. I have had increase in discharge and one of my boobs (my smallest one) is very sore. Has anyone ever dealt with only one extremely sore boob? I feel like my smallest boob is the only one that gets super sore. 🤦‍♀️