Hello, I Am 28, Married With 2 Year Baby. My

Hello, I am 28, Married with 2 year baby. My last period was on 5th September. Prior to it I missed one period & after taking tablet for having period I got it back on 5th September. This symptom return back. We had sex during those days. I had one pill within 72 hours of unprotected sex & taken meprate tablet for 5days(3Oct-7Oct)
I am uncertain if this month period delayed due to sex or my missing period problem?