sore boobs

Hayley • 32 years old. MMC 8/5/16 at 13 weeks. My rainbow baby, Milo Wild, was born 8/30/17! 🌈 Chemical 11/2020. Baby girl Due 9/9/2021! 🌈
Are sore boobs in early pregnancy a cause for alarm? I read online (terrible idea I know) that it might be from low progesterone. I'm getting blood work tomorrow but my doctor will only test hcg and not progesterone. I'm just worried because I had a mmc in august so basically everything makes me nervous!