Tender Breasts

FarmWife 🌾 • 2015 👧🏼 2017 👼🏼👼🏼 2018 👧🏼 🌈 2020 👶🏼
I have had tender breast for 5 days now. My period is expected Saturday. Glow stated breast tenderness for that long needs to be evaluated. 
​Any opinions or what maybe causing this?