Periods and Stress

So my boyfriend and I went to Hawaii on April first and i was really sick with a fever and i threw up, i had just ended my period. We had sex throughout vacation but we were protected everytime so im almost positive im not pregnant. My period is 4 days late and Ive been stressed out a lot recently, and now Im stressing about getting my period so I feel like it is making my period be more and more delayed as we speak. How do I not be stressed about getting my period? Also, I normally get sore boobs a week before my period, and a few days ago my boobs started getting sore so Im hoping it comes soon. I get very impatient