i was on yaz for a while and the stopped for about a month.. buring that month i had unprotected sex.. ive started the pill again and it says side effect include sore boobs.. but ive also read that side effects of pregnancy include sore boobs?

which could it be ?!

im soo paranoid!
my period is due on the 13th.. i can test 5 days before and it should show me, correct?