I found out I was pregnant two days ago on the 16th of August. I was quite pleased, but surprised as we only got married on the 26th of July. My cycle is usually 24 days, but changes sometimes. The first day of my last period was 19th of July, meaning I would have ovulated on the 29th July. I had sex with my husband on our honeymoon on this date and the day before. Also a few days after. So I was thinking that this is when I conceived, making me 3 weeks pregnant. I did a Clearblue conception test to make sure and it said I was 2-3 weeks pregnant. These tests are 92% accurate for the conception dates.
However, my husband is aware that I made a stupid mistake and had sex on the 8th of July with another man. It was a drunken, stupid thing to do which I regret very much. We didn't use a condom but he didn't ejaculate inside me. However I am aware that there is still a chance I could get pregnant this way. According to my phone app I would have ovulated on the 5th of July. I didn't have sex for about 2 weeks before the 8th July. Would the egg have survived long enough (from 5th July) to be fertilised by sperm on the 8th, making me 6 weeks pregnant rather that 3? And if so, how can I find out for sure? I need to be sure the baby is my husband's and not this other man's. I feel so stupid for making such an awful mistake, I just want to die at this moment to be completely honest.
My husband also didn't ejaculate inside me, whenever we have had sex.
Really I need to know if I am 3 or 6 weeks pregnant (from ovulation) . Would I need an ultrasound to know for certain?