I TOTALLY understand. I had something similar happen at my 5 week scan, a gestational sac and a hint of a yolk sac. Mind you my Dr. wasn't concerned at all and she congratulated me so I know I should relax but it is so hard. I just want to see the little bean. I have a repeat scan in 4 days.
I am sending you super positive, sticky vibes and I have a feeling everything is going to be great!