okay, then It should definitely be the first week of October, I use all the conception calculators on Google they all say in October too... But you never know some people still tell me maybe not which scares
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If the doctor said you're 11 weeks then you got pregnant during ovulation after your September period. You couldn't have gotten pregnant before that. I'm 11 weeks too and I got pregnant the first week of October
Go type in how many months i am on Google and use that page, it helps alot. It tells you when your due and your conception date. If you missed your October period you more then likelygot pregnant around your last period. In my opinion.