Hiya. I had a scan at 5w2d (my dates turned out to be spot on) and all I saw was a gestational sac. Empty. No foetal pole, certainly no heartbeat.
https://i55.photobucket.com/albums/g155/helenrees/Me/belly2/Scan%205w2d/DSC_5814edit.jpg
I have seen a couple of photos from google from late in 5w (so 5w6d etc) that have a little bean and it is sometimes possible I think to see a little white blob of yolk sac/foetal pole but don't be disappointed if you don't see it. All they are looking for at this stage is that the pregnancy has implanted, and hence a gestational sac (i.e. what you see in my pic). I was a bit disappointed that we didn't see a 'baby' but my OB was more than happy with what we saw.
They'll probably measure the GS (which is what they're doing in the top right of my pic) and estimate your dates from that, check where it has implanted as well (i.e. high up in the uterus or down near the cervix) and check it's in the uterus in the first place. They might even check (with the US) the state of your cervix too (i.e. mine was long and closed which was a good sign).
Good luck!