If you have irregular cycles, your 5 weeks could be spot on! I've never let them use LMP to calculate gestation in my pregnancies as my cycles are so long, but I ovulate 13 days before the end of the cycle regardless of the length! So I'd always go on ovulation date The fat lady certainly isn't singing for you yet! As forshelby said, you'll feel an ectopic - and they'll see something in a tube, so don't let them terminate a potentially 100% healthy pregnancy on a hunch.

Big for a stressful time, I hope this is a sticky, take home baby