Contraceptive Pills

I'm using Althea Pills po. Is it still effective kung 15-20mins late akong nagtake? Usual time ko po to take my pill is 8:00 pero nalimutan ko po.. 8:15-8:20 na po ako nakainom. Worried po ako to get pregnant. Pls enlighten me po. Thank you. #Pills #contraceptivepills #contraceptives