A few weeks ago I noticed that when my nipples get hard, the tips turn a yellow/white (they may have been doing it before this is just the first time I've noticed)? It doesn't seem to happen every single time and it varies in color extremity. There's no pain or discomort associated with it, it's just the color changing. I'm 15, am not pregnant nor have I ever been pregnant, and my nipples are inverted if that makes a difference. My mother has Reynaud's but I don't think I have it because my fingers and toes have never looked as extreme as pictures I've seen of it/ I haven't felt pain from discolored extremities. I tried looking it up but all the results were either about pregnancy or talked about pain coming with it. Help?