Hello, I had taken 'Unwanted 72' Pill 3 days before my Period due date and now my periods are delayed by 2 days & still waiting. Is it common that if any Pill consumed it delays the normal Peirods process & by how many days?

I checked with CIPLA PREGTEST for pregnancy test as i dont want to get pregnant now. It is showing SINGLE Pink Line stating as -ve results. Should i rely on this test or again carry test? Please advise urgently.