Morning after pill and chances of pregnancy

Patient: I had protected sex three days after my last period, where the guy didn’t ejaculate. For safety precaution i took the morning after pill within a few hours of intercourse. A few days later I started secreting a brown discharge that seemed like old blood, then following that there would be secretions of fresh blood with blood clots. However now my period is three days late. What does this mean?

Symptoms: Pimples