No heartbeat, the baby measured 8 weeks!

Yesterday I had my 1st abdominal ultrasound. The Dr mentioned that the baby measured at 8 weeks but they couldn't find heartbeat. My heart broke hearing those words.
They have scheduled another abd US next week. 
Since I had no bleeding.
God forbids but does anyone know anything about a situation like this ? Is there a chance?
This is my 1st pregnancy and I feel like I am wrecked!