Is my period late?

Kaityn
Originally the app said that my period was due on the 4th of this month. My last cycle was May 6th-11th. I had unprotected sex a few times this month but none when I was in my ovulation time. Wondering if I should wait it out or take a test...I'm not on birthcontrol so I don't know if I'm a few days late or if my period is just being irregular. Any advice?