If it helps, I'm in the same boat. I think I ovulated on Sept. 30 and I don't feel pregnant but my doctor tells me I am! This is my third pregnancy. I'm doing as you - trying to think when it started with the first ones - and I think it was further along, in both cases, because I normally have a 40-day, sometimes more, sometimes less, cycle, and plus each time I expected it to take a while to get pregnant (silly, I know) so it was a while before I missed AF and/or had symptoms... maybe 8 or 9 weeks? Even then, and you would think I'd know better, with the second one I couldn't figure out why I kept falling asleep and why my milk was disappearing.
So hopefully for both of us, it's fine. How far along are you?