I have irregular periods.last was on 1 sep.i had sex on 2 oct & still no periods.i had primolut n 4 days prior to oct 2 to delay periods (totally 5 tablets).yesterday i had checked pregnancy with urine test its negative.any chance to get pregnant?

Hard to guess: It can be hard to tell if a woman is pregnant because some of the symptoms seen in early pregnancy can also happen in non-pregnant women. A home urine pregnancy test gives a reliable result by 3 weeks after sex (3 weeks after when conception might have occurred) or 1 week after missing a period. If tested less than 2 weeks after sex, a negative result may be due to testing too soon.