My OB would only use the u/s as she would find it difficult to find the heartbeat with a doppler...which was a bit sad cause I wissed out on hearing that magical sound....

Also my placenta was to the front which actually cushioned the kicks bubs was giving me so I did not feel kicking until way later which was freaking me out....

I hope the 2 weeks goes by quickly for you and you don't worry to much more....sending you all the best wishes I can...