If you saw the embryo (aka baby) you have not miscarried. The amniotic sac and yolk sac are the same thing and it is what the baby floats in. So I'm a bit confused, but perhaps you are as well. All I can say is that if you saw the embryo you haven't miscarried.
If i'm right in reading your 6weeks along? maybe a little bit further now, your still early days things are still developing so don't panic too much because the stress won't help you or your baby. If you have any spotting, cramps or unusual pain in your belly then go a&e asap get it checked out. hope everything is ok. let me know how things go and if you need a chat just message me any time xxxx