Confused

Tresha

So I was sure I was having a miscarriage and I'm sure this is it it also had a very small sack but nothing was in it now I am suppose to be 7 weeks and 3 day went to emergency for spotting and saw my baby and a heart beat and now I'm confused because me and my fiancé opened the sac and some fluid came out and nothing else that was it anyone know or every experience this