Oh hun, I agree with UntoldAngel, can you ask to get another scan at 8 weeks or something like that? With both my pg, they deliberately gave me a scan at around 8 weeks from memory so I wouldn't get stressed if the HB couldn't be found as it was probably too early. I think you'll go nuts if you wait till the 12 weeks. I'm praying for a nice little HB for your little one and for a nice sticky pg.