I Am Pregnant I Found Out Last Week So I

I Am pregnant I found out last week so I went to the doctors and I accidentally gave them the wrong date of my last period so they said I was 6 weeks I went to a private scan today and they have measured baby and said I'm 8 weeks and 4 days my last period was 2nd October 16 I had sex with 2 guys with in my ovulation week the first guy was on my first and third day of ovulation week and the second guy was on the 5th day of ovulation week but I took the morning after pill the day after the second time I had sex and the 3rd time I had sex.

I am really worried please can you help me