Stopped breastfeeding. Ouch!!!

I slowed down my pumping for a few days cutting me sessions in half. My supply went way down and so I finally stopped. Today is day 2 of no pumping or feeding and it feels like I have boulders for breasts. My nipples sting and every time my child kicks or grabs at me it feels like I'm getting kicked in the stomach. Any pain management advice? I don't have cabbage and I'm currently sitting here with packs of frozen pees in my bra...