One of my nipple has rexently changed (I'm pretty sure anyway. I don't pay a huge amount of attention to them but I dont think it was like this). Its sort of dipped in on the tip. It also doesn't get erect as easily as the other one. I stress about my health 24/7 so it could be me overeacting but I'm a little worried. The only other thing that is worth mentioning is that about 2 weeks ago both of my nipples were constantly erect and sore for a week then it suddenly stopped and now this. Any ideas what it could be? If anything that is