it's not yet that confirmed. the only positive diagnosis for that is to have an ultrasound / final urine test confirming that you are pregnant.
being 3 days late in your period is not yet confirmatory of a positive pregnancy. though feeling bloated and peeing for more than your regular frequency may be indicative of pregnancy, these are also signs of upcoming menstruation. the signs of pregnancy and menstruation are usually the same so it's confusing too. a month after the supposed-to-be period and you still have none, that's something more indicative of pregnancy. but for three days, try to wait for some time still.