7 weeks pp, breasts still so tender

M

I’m 7 weeks pp with my second and my breasts are so tender about 90 min after I pump and continue to get even more sensitive the closer I get to pump (I’m pumping every 3 hr, around the clock). I don’t remember this with my first. It gets so bad that I have to hold my daughter away from my body for fear she’ll brush up again my breasts. Even my clothes touching me hurts. Any thoughts on what might be causing this? And when it might stop?!