If you take an extra week of pills from a new pack then have your period and finish the rest are at risk for pregnancy?

Taking an extra week of birth control pills from a new pack will likely delay or prevent your period due to the hormonal shift. It is important to follow the dosage and usage instructions of birth control pills as instructed by the manufacturer or a healthcare professional to ensure their effectiveness in preventing pregnancy.

As long as you have been taking your birth control pills correctly during the first 7 days of the new pack as instructed, skipping pills or even extending usage to a total of 2 packs would still provide good protection. However, extending to further pack is not advised