in need of some advice

I would just like some advice on this topic. 

So according to eve I'm 7 days late. I have no period symptoms or anything for that matter. I feel fine just stressed with college. My boy and I have been having sex, regularly. But we are always protected. Just trying to figure out exactly why my period is so delayed. And I doubt it's from stress as I only truly started stressing on Friday, where as I was due on Monday. Any advice?