If less than 12 hours have passed since you missed a pill, your contraceptive protection is not reduced.
Take your tablet as soon as you remember to miss a dose, and take the next tablets at the usual time.

In your case, as I understand it, there was no missed dose, because you realized about the lack of a pill in advance. Please take another tablet from the blister on Sunday (i.e. Monday) and take another tablet every day, even though the scheme will be postponed until the end of the package.

If more than 12 hours have passed since you missed a pill, your contraceptive protection may be reduced. There are two basic rules to be followed in the event of missed pills:

1. Never stop taking the pills for more than 7 days. 2. A 7-day continuous period of taking the tablets is necessary for sufficient inhibition of the hypothalamic-pituitary-ovarian axis.

If you miss a tablet, follow these instructions:

WEEK 2

Take the last missed tablet immediately after remembering to miss a dose, even if it means taking two tablets at once. Then you continue taking the tablets at the usual time. If the medicinal product has been in the first place of When used correctly, there is no need for additional contraceptives. If you miss more than 1 tablet, you should be advised to use additional contraceptives for 7 days.

Here you can check the availability of the drug with the possibility of reserving it at the pharmacy: 

https://www.gdziepolek.pl/produkty/7816/asubtela-tabletki-powlekane/apteki

I am sending you materials that may be helpful: https://www.gdziepolek.pl/artykuly/jak-prawidlowo-stosowac-antykoncepcje