Hi Ladies,
I need some reassurance... this is playing on my mind something silly!
I went for a dating scan about 6 weeks ago and was told i was 6-7 weeks... wonderful, that slotted in nicely with my LMP date of 03/09.

So, i go for a NT scan last week and find out were having TWINS!
But... the dating she measured read as 13 weeks and 1 day. Which means my cycle/AF starts the week before 03/09 which is the week i get dark ikky brownish spotting.

Now would this mean that my AF actually starts with the spotting? Not on the rich red flow that I always thought (and read) was the start? And that i concieved a week or so earlier than I thought... which would also mean that conception was anywhere from 1 to 4 days after AF stopped - bit soon isnt it?

I've been trying to read somewhere about fetus growth spurts... but i didnt think they happened until after 13 weeks... that up until 13 weeks they all grew the same and that measurements for dating were pretty right on.

Any info you can give me would be brilliant, as not only am i confused in general about my little peanuts but what i thought i understood about my body... now seems the opposite!