Movement But No Heartbeat Is That Possible??

Jenel
So I Went To The Doctor's Today...When She Entered The Room, She Started To Ask Was I Having Any Pain I Replied "No"... So She Take An Ultrasound To See If She Heard The Baby's Heartbeat, But Couldn't Hear Nothing But Movement... She Then Took Another Ultrasound But This Time Vaginally...Still No Heartbeat...So She Then Measured The Baby && Told Me That It Likes Look I Miscarried...But However My First Two Appointments Was A Success Of Finding A HeartBeat?? So How Is It Today There Is No Heartbeat...However The Baby Is Laying Low In The back Of My Uterus??? I Need Some Understanding...Please Help