Breast Tenderness??

Okay so AF came last Sunday. Lasted about two days. The rest was spotting. Of course I had sex the past few weeks. It's been a week since AF supposedly came. And my breasts HURT. Like they're more sore than they were a week ago. I don't know what to think because I don't want to get my hopes that maybe my super light two day period was implantation. But they hurt and make me feel uncomfortable. Help a girl out y'all. What do you think?