Help me out pls

Me and my bf haven’t had sex since two months ago....,my period was late this month but lasted a week(it was lighter than usual). We don’t have sex but we do other things but never anything that involves penetration. I’m just stressing out cause my areolas look different and out of one of my nipples there was white stuff(this has happened to me 2 times now) any help or just reassurance that I’m just stressing out