Should I be worried

So my period is 5 days late today tomorrow will be 6 days. Sometimes I don't get my period on time but I'll have signs of getting it soon 
I have no signs what so ever. 
Me and my boyfriend had sex may 31 and my period was supposed to come June 4 
We did it with a condom then he took it off and we did it again without one. 
Should I get a preg test ?