I'd wait for another scan too. I don't think your Dr would have given you the referral for the nuchal scan if he knew that things weren't right
Agree. A doctor wouldn't (shouldn't) not tell you what they believe is really going on. If he thought it was unusual not to see a heartbeat then surely he'd just be honest and say so, maybe even prepare you for the worst.

It could very well be too early. Hang in there and I hope you can get another scan soon to ease your mind