Sore breastfeeding boobs

So I have a 6 day old baby and we are trying to exclusively breastfeed! My milk cane in two days after she was born and now I'm just trying to find some relief from the soreness. I've hand expressed in the shower and yes it does feel better but I can't take a shower every time they hurt 😭 I've heard cabbage leaves help but is there anything else? Do I just have to stick it out? And about what time in our breastfeeding journey does the sore hard boobs go away?