Molly- just a few positive posts i've found with women who were in your situation. Don't lose hope, it's still EARLY!
"I had a transvag ultrasound at 6 weeks 2 days and everything measured perfectly but no heartbeat yet. I was told this was normal and not to worry. Now I'm 8 weeks 3 days and our little bean has grown well and has a heartbeat! I understand your fears! I had a miscarriage previous to this and it seemed that everybody getting ultrasounds at 6 weeks had heartbeats. Hang in there!

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"With our first daughter we went in at 6w6d and there was no heartbeat. A week later there it was! 6 weeks is super early for a heartbeat anyway. The range is 6-8 wks to initially hear it - so 6 is on the low end. Good luck!"
"My first u/s was at 6 weeks 5 day (done vaginally) . My specialist told me a day or two earlier and we wouldn't have been able to see it. Not sure if it was a vaginal u/s (more detail) or abdominal (less detail), but the quality of the machine makes a big difference too. "
"Same thing happened to me. Was 6w3d and there was no heartbeat. Went back 13 days later and there was an amazing heartbeat and baby was growing right on schedule

I'm sure the same thing will happen for you, too."
"I had an ultrasound at 6 wks 1 day & OB\GYN said there was no heartbeat she could see nor could she identify any parts of the baby, only the gestational sac. I had my next US at exactly 8 wks & didn't need to wait for the doc to even say anything. Even though I have no experience as this is my first, it was instanly apparent that there was a baby in the sac & its little heart was flickering; the heart beat was so clear!! The growth in those 2 weeks was Amazing!"
"My first U/S was at 6w 2d and we saw both sacs and a fetal pole, but no heartbeat. I was really nervous and anxious for the next week, but when I went back at 7w 2d you could see the heart flickering away and we even got to hear it! I know it is easier said than done, but try and relax until your next appointment, 6 weeks is still really early!"
"The same thing happened with my last DD. I went in and measured 6w 4d and they only saw a gestational sac and yolk sac. I spent the next two weeks worrying and constantly checking toilet paper for blood. Two weeks later her heartbeat was nice and strong. She is a healthy 2 year old now. These babies grow at their own pace, not on a doctor's timeline."
So DON'T WORRY (easier said than done, I know).
