Yeah....I would say you may not. You can see more with a vaginal than the abdominal. Many times with an abdominal you can't even say the sac that early. Everything is SOOOOO small. I remember my 1st US with my first. She had to REALLY point out that tiny black dot in the corner with little blip....said oh can't you see the heart beat. I was 6wk 3d. It was so discouraged that I didn't really see it. LOL.
Now we don't do US unless there is a problem so I haven't had one that early again. This is #4 for us so we know alot of what to expect