Nipple problems when on period??? 😭😞😣

Okay so the week before I get my period my nipples ALWAYS get sooo dry and flaky, and they stay like that until a few days after my period is finished. It is EXTREMELY itchy and I can't resist but scratching it, it ends up bleeding n shit sometimes. And when I wear a bra, it leaves yellow shit on the fabric and it's disgusting 😭 I try to put Vaseline or aquaphor on it but the relief is only temporary and they get dry again. Can someone explain what this is and if there is some way to stop it??? I'm suffering 😭😭😭