Boobs😐

Currently breastfeeding, having to pump because baby girl is hitting a growth spurt I believe. I finally got her to eat on the boob for a few days straight no need for supplementing with formula, but she changed her mind. Well I looked on google and no answers there, but after I got done pumping after supplementing with a bottle the top of my chest hurts, like my collarbone/top of breast bone. It feels like someone punched me in the chest. WTF IS THIS?! Google keeps thinking I mean my actual boob but no that’s not it. Anyone else experienced this? Know what it is?