I can say that you have been through a lot dear. The two miscarriages and the down syndrome. I am sorry for all this. But then I can say you are so strong. Others would even have given up in fertility. But you have not. You are still in search for your happiness. Which is something good to say so. Do not give up. I believe that one day things are going to work your way. The journey might be difficult but you will make it at the end of the day. About the ultra sound. It is nothing to worry about. Just be calm and everything will go your way. I believe your story is going to motivate others out there. Especially those who ae in search of children.