Hello girls! Could you tell me if the nipples have become slightly rou…

Hello girls! Could you tell me if the nipples have become slightly rougher to the touch after another bath? I didn't rub them too hard with a towel. Has anyone experienced this? Is it preparation for lactation? Also, I read about different anatomical breast structures and that problems can arise if the nipple is small or short. What do others think? Does it affect anything? Do I need to take any additional steps during pregnancy?