August 1 would have been too early to detect the pregnant horomones.
If your last period started July 10, you would have gotten pregnant 2 weeks later. They measure off of the first day of your last period to say how far you are but the actual conception took place 2 weeks after the first day of your period.
I took the first test that was negative before I had sex with him then I went to the doctors again septemember 8th and it was postive and I was already 8weeks and when I count it it seems right my due date is April 15
To me it seems like you were pregnant Aug 1st. it was just a false negative. or something because if you were already 8 weeks on Sept 8th. the u would have had to be then. so did you sleep with this guy before you had the first test or after?
even then, condoms are not always 100%. Even if he says he didn't, there is still pre-*** that you have to worry about because it can still get you pregnant. My gf has 2 kids both where with a condom and birth control... they are not always 100%.
Even if I used a condom and it didn't break not did he do anything my due date is April 15th
you can use the conception calculator based on your actual due date to see when you conceived. Unfortunately that is still only an estimated date and since they were both in the same cycle, your best option would be a DNA test when the baby is born.