Thanks for your valuable feedback. every one is scaring me about large yolk sac which leads to miscarriage so I am worried about this, hope next scan would come in a positive way. I will keep updates about my further condition.
Well the egg sac and heart beat is a good sign. Its probably too early to really tell you anything else but a lot happens in one week so that's probably why he wants you to come back to make sure its progressing. I wouldn't stress everything sounds normal
7weeks is still really early to get a clear picture