Hi.

Although i am not on the same pill as you...
My advice would be dont be to worried but keep an eye on the situation. If you miss a pill, and it is just one pill and you continue taking 1 a day afterwards, it is pretty damn unlikely you'll get pregnant. However there is ofcourse a small chance, everyones different but i miss pills regulary (by accident) i'd say in total about 5 a month and i have been in sexually active relationships since i was 15 - i am now almost 21 and have never fell pregnant due to it.
Just to be on the safe side, use a condom for the next week if you are very worried, and obviously be sure to make sure your period is regular this month.

Hope this has helped,

Becki x