I had sex on 11th august. I used a condom and also took the morning after pill. I then took a period on 22nd August. I was due another period on 22nd September and this never came. I was pregnant. My due date was 30th May, but due to complications she was born earlier without me going into labbour.
I need to be 100% sure that I NEVER conceived on 11th August.
I think I am 99% sure but there is always that element of doubt.

Can you please help?