Haven’t got my period yet

Got my period 5/15/18

Started getting sore breast 6/3

I did have unprotected sex did not cum in me

Been feeling a little nauseous, not that hungry at all today.

But I was suppose to get my period today and it still hasn’t come, should I wait another week and see if I get my period or just take a pregnancy test within the next 3 to 4 days.