Sore nipples...

Leah • ✨Leah✨PCOS 👣🌈 Angel baby 12-13-17 👶 Arianna Kaitlin 8-24-09💜 Engaged 💍 Rainbow baby due 11-21-2020 🌈
What could this be a sign of? My period isn't due for another 2 weeks at the most.