how do I relieve my sore breasts?!

idk if I'm pregnant for sure yet, I took a test and got a vvvfl but I'm gonna retest in the a.m.. but anyways, at first about a week ago it started as just sore nipples but now it's my whole breasts, just ACHING. when I walk it feels like I'm jumping they're so sore and my bra isn't helping any. lol is there anything I can do to relieve the achy/heavy feeling?? tia!