possible pregnancy

my period is 7-8 days late i checks i ended on the fourth in the morninb , so about 19 days after the last period ended, ive been experiencing some cramps today and yesterday, but still no period i had unprotected sex on the fourth at night. is it possible im pregnant?? periods come between 28-35 days should i wait it out. also ive been stressed and depressed this month so maybe that has a part??