Oh Ang I'm so sorry. It is very early so maybe you calculated wrong. At my first appointment (which was at about 4w) they couldn't see anything. I went back a few weeks later and there was a baby with a hb and arm and leg buds! I hope this is what is going to happen to you!
Ang...while it might be better to wait a few days to see anything...I think if you are feeling anxious and upset about it that you go to LIJ and get checked.. I dont think all the stress and anxiety is good for you.