Sore breasts at 13dpo

Ugh I had pretty much given up and assumed AF was on her way with these sharp cramps I've been getting off and on today but now I have sore breasts for the first time ever in my life. I've only ever gotten sore nipples before my period or after ovulating. But I'm already 13dpo and AF due in a day or two. Do you guys think it's just a new cruel way AF has thought up to torture me or could it mean I might not be out just yet? ***fingers crossed***