Does Delayed Period And Sore Breasts Indicate Pregnancy?

Hi Doctor!My period is delayed by 5 days and I am having sore breasts but no nausea.Is there a chance of pregnancy.Last month I had lot of digestion problem due to root canal and antibiotic courses.I was taking Yaz then.This month I have discontinued it after periods.But I had a light period twice.Once 10 days before date and the other on date.After quiting Yaz my periods are delayed now though i had protected sex(condom).Quite confused!