Left breast pain?...

Vera • A wife and a mom to a beautiful baby girl (November 7th 2014) a rainbow 🌈 baby boy.(October 31st 2020) and now TTC last one.

So 50 days no period and yesterday I started to have this pain on my left breast by the nipple the pain feels like as if I was punched but I wasnt and I checked this morning there is no bruse or anything unusual but the pain seem to be kind of growing. Any ideas what it could be ladies?