Boobs after breastfeeding

I don’t know whether to make this nsfw but here we go. So I’m still breastfeeding my almost 15 month old but I feel like this journey is coming to an end soon? Ish? I don’t know. Anyway, my left boob is noticeably bigger than my right and the left is the one he’s favoured through this journey. After breastfeeding will this even out?