I'm kinda freaking out! 😭

Sydney
my SO and i had sex (unprotected) on may 28th (i ovulated on june 2nd according to this app) and a couple days ago, i noticed that my breasts are kind of sore and i am seeing more viens become more visible 
is there any explaination to this? 
my period is supposed to come around the weekend and i'm nervous that it might not (my period can last from 5-7 days)