Thanks girls! I think I was actually getting a bit confused about "seeing" an early HB on ultrasound and "hearing" it on a doppler, LOL. Duhhhh....I blame it on 10 months of no sleep...hehehe.
Now that I actually think about it, I have realised I was sillly to panic. Geeeez, you wouldn't think I have had 4 pregnancies, would you??