I just had a 5 week u/s yesterday. The only thing that they were able to see was the gestational sac and the yolk sac. I was able to ask lots of questions and I even got to bring home a pic. We werent able to see alot but it was reassuring knowing that my little bean is being closely monitored. I wouldnt worry if you dont see much when you go in, everything right now is super small and you will be surprised at how fast everything grows. I go back this Thursday for a follow up for week 6 and said by then we should see a fetal pole and a heartbeat. I wouldnt worry as everything will be great. And congrats on your BFP!!
sent you a pm - don't worry!! You will have great news tomorrow!!