Feels like razor blades in my boobs

Bethany
I only produce 6-7 oz a day right now. 3 weeks PP with second baby and my supply is par for the course for me. My breasts are starting to get this terrible razor blade sensation in the breast tissue, not the nipple. Any thoughts? I don't recall this happening with my first LO. I'm exclusively pumping and only nurse for bonding. I exclusively pumped with my last one after 6 weeks of a terrible BFing experience and a starving/underweight baby. Back then my breasts (mainly nipples) only hurt in those first two weeks of BFing. Thoughts? What gives?