Sore boobies!

Aimee • TTC #1 since Dec 2013
Could this be from progesterone suppositories? I'm almost halfway through my TWW and I'm trying really hard not to become psychologically pregnant, like usual, but I'm 6dpiui and my boobs are already sore! They also get sore premenstrual so I'm trying not to get my hopes up. Anyone else notice sore boobies with extra progesterone? Or does anyone know why the boobies get so dang sore? Thanks!