I had a scan a while back that put me at 5+6 with a due date of 15th September. So since then I've been counting the weeks and I think I'm 10 weeks today. However, I've just downloaded the NHS pregnancy daily thing which puts me at 11 weeks and earlier today another website also said 11 weeks. Can anyone else work out from that due date how pregnant I am? I really do think it's 10 weeks.