Oh Chris that is scary, but similar thing happened to me... I had a bleeding scare at 6wks (www - milestones) & went to emergency ward at local hospital & the next day they did a scan & said they could only see a sac, no bub & then told me to empty my bladder so they can do an internal scan (dildo cam). Well I was quietly freaking, then they did the internal scan & found bub & the heart had only just started beating in the last few days apparently. Also obgyn wouldn't do a scan b4 27.5wks to double check gender as he said his u/sound machine is no where near as strong/hitech as the u/sound clinics are. I truly hope this is all it is for u, hang in there.