Hi i im 28 weeks pregnant.I had my dating scan and a weeks ago and they told me i was 11 weeks and 2 days pregnant. when i counted back it fell on the exact day of my last period. I always thought that they measured the baby from conception which would have been 2 weeks later. so does that mean that im classed as 28 weeks pregnant but the baby is probably only 26 weeks. Am i right or did i concieve when i was having a period i didnt think that was possible just a little confused lol xx

p.s
my due date is exactly 40 weeks from the day of my last period is this the way they calculate it? ( 40 weeks from lmp & 38 weeks from conception ) if so then both dates are saying the same thing lol xx