Hi, In August I Done A Terrible Mistake And Took

Hi,
In August I done a terrible mistake and took the morning after pill within the 72 hours. I had my period right on time at the beginning of September.
Then I had sex with my partner around the middle of September... And yay I'm pregnant. I've taken a few tests and they are faint lines but they are there and also done a clear blue that says 1-2 weeks! Witch is perfect! What's the chances it could of been from August? I'm so scared!
Thanks in advance.