Will Primolut N For Delaying Periods Increase Chance Of Pregnancy?

hi, i am 21 yrs old weighing 44 kgs and 160cm in height my periods are expected on 13th of this month, i had sex with my husband on 9th, we are not planning for a child so using the calender method. but now if i take primolut n for delaying periods as we are going on a holiday trip will it cause unexpected pregnancy