Have you looked around online for similar situations? I did just now... and found some interesting stuff. Like - LOTS of stuff. And with ALL of these women, ALL in the same situation, and the rate of many many more babies going to term than m/c - I'd say not only are you in good company, but it's fairly common with EARLY u/s.
One thread contained this, I thought WONDERFUL, tidbit:
My midwife calmed us down and refered me to a chart that said at 5 weeks, 0% of ultrasounds showed a fetal pole, and at 6 weeks only 86% did. She felt that given that our dates were pretty much just a best guess, that this was not the end of the world.
Thread Location: http://www.mothering.com/community/t/670148/5weeks-no-fetal-pole-should-i-be-concerned
Article that says: Development The gestational sac is often the first thing that most transvaginal ultrasounds can detect at about 5 weeks. This is seen before a recognizable embryo can be seen. Within this week, at about week 5 ½ to the beginning of the 6th week, a yolk sac can be seen inside the gestational sac.
Article Location: http://americanpregnancy.org/pregnancycomplications/earlyfetaldevelopment.htm
*********And ------ MY FAVORITE! Where there is same situation -- and then an update -- BABY BORN!!! With pictures of that newborn baby, that was "not there" at 5 weeks, when mama "should have been" 8 weeks. (So TAKE HEART!!)***********
Well- I went by what the 'calculators' say, and my doctor did too, so were guessing I got pregnant on 9/22 since it would have been right about when I was ovulating. Which would put me at 8weeks now. He decided to do an Ultrasound and just look around, he wasn't going to, but asked me if I wanted to, and I said, yeah- why not... ;) I was hoping to see something.... Well, all he can see is a gestational sac, w/ NO Fetus. He said that it is measuring to be maybe 5weeks. He poked around so much, ulgh... He said that he wants me to come back on Tuesday to do another ultrasound.
He said either it is too early or the pregnancy is not going to be successful. I am devastated. My boyfriend and I want this baby soooo much. I've been looking around everywhere online to get more info and it seems that I just cant get enough. I've read some stories where this exact thing happened to others and the sac ended up being about 2 weeks younger than what the doctor said and that at the next ultrasound there was a fetus.. and one lady's story even said that she went back and none, went for a 3rd one, and boom- there was her baby...
Thread Location: http://www.misdiagnosedmiscarriage.com/mycommunity/viewtopic.php?f=14&t=9500
Modern medicine is fabulous - WHEN it works. All these super early tests, by super imperfect humans and our machines. And expectations based on averages..... Causes an awful lot of stress, it seems.
Hang in there!!