First day of pregnancy was sept. 30
Mine is July 2 and my last period was September 25th and my conception date is estimated to be Oct 9
July 6 EDD puts your "start date" of 40 weeks at Sept 30 (that would be your LMP, do you know when your last period started?) which puts conception date somewhere between Oct 9-18 depending on ovulation and activity. It could be before or after the 12th there's no way to know for sure unless you were closely charting ovulation and sexual encounters.
To explain the discrepancy between my response and previous answers - The first day of your 40 weeks isn't your conception date. People think it is but it isn't. It's the first day of the last period you had before conception, which would be Sept 30.
Actually, it makes your conception date Oct 13th according to this app
My due dates june 15th and they told me I had had sex from sept.19-22nd
My due date is july 5th and they told me that my conception date was sept 29th or 30th