Thankyou AJP and satya. I am going to go ahead with the scan. Hopefully it'll just be good results then I won't even have to worry.

Lulu- apparently higher hcg can indicate chromosomal problems or DS. But it's not actually the level of hcg, it's that it doesn't go down later in pregnancy which is common in DS pregnancies. So who knows why they think a BT at 8 wks is relevant.