Oh Jo Please dont lose hope; I had almost the exact same situation with Stellan. I prepared myself for a miscarriage, I was so devestated. Turns out he was just a slow grower and 2wks after my initial ultrasound there he was, a little bean with a heartbeat! He measured super behind until 20wks when he was measuring exactly to the dates I thought I should have been; and then arrived on my original EDD! So please just hang in there til its 200% certain you should give up hope ok? We're all here for you no matter what, remember that!