I am pumping for 2 weeks old dd and either yesterday or the day before noticed some white splotchy spots on one of my nipples. They are only really noticeable right after pumping (dd doesn't nurse) and then the area turns paler and kind of blends in. That nipple also feels dry and rough when I touch it. I don't have any pain in the nipple or breast. What is it? Do I need to worry about it? Also, I've been going completely topless for days to try and heal a large crack in the same nipple, but it's taking forever!