It should work if they do an interal scan ad thats what i had today. You cant hear it as it far to early but i saw it. Still amazed now :-)
id just like to give you a heads up now, i heard my babys heart beat when i was 8 wks but couldnt hear it at 12...so if that happens to you, dont be alarmed...if your really concerned during ur next appointment and they cant find the heartbeat, they may do an ultrasound. :)
Congrats I have my 2nd scan Thursday (1st scan didn't count as I was to early) I will be 6 weeks 4 days when I go so I hope I can see the heartbeat. My blood tests have come back great.... Very excited xxx