I'm really Scared .... no heartbeat...

Today I went to the follow up after last week I lost what probably was a zack with a baby... and the sonogram showed there was still a baby with heartbeat. Today they put the sound machine (no image) and the doc didn't find heartbeat... she said she was going to send me for a sonogram but I told her I already had an appointment for the Translucent for the 28th, so she said ok then come back to see results. I'm really scared I want to stay positive but I can't stop feeling afraid!! Has anyone ever done that with the sound machine?? 😓