pain in boob

ashbash4 • Mommy to Carl and Cora; LOVE THE LIFE YOU LIVE; fuck what anyone says
My son is 9 months and today I felt a pain in my boob. Towards the bottom, almost like I have a bruise but there is no bruise. It only hurts while I press on it, in that spot. I'm not engorged I know what that feels that. Plus my son just ate.
Anyone know what this is??