My period is never late, but now it is 2 days late.

I didn’t have sexual activities since my last period, but I have been very stressed out because of all the things I need to do including work, university exams, concerts, organising, I had some relationship issues which are getting resolved, but still, I hate it when my period is late, even though there is no reason for me to panic that something happened, I still do.

I had taken my first Plan B ever in February and that was the month when my period was early 3 days, so maybe I guess this is my cycle normalizing again by being a bit late? Or is it just the stress?