In a pregnant not pregnant state right now

I know this is a little long and no-one probably cares but i need to release somewhere. Maybe someone will reassure me or help me cope. Monday I spotted. Just once and no more for the day. Yet I felt concerned and they said not to worry and I was told to come in first thing in the morning. Well got checked cevix is still closed. But when she went to do the ultrasound, she saw the gestational sac and yolk sac, but the baby was gone. We can't find it. I am scheduled to return next Monday (1 week before my official 2nd appointment) to try and look again. Not understanding what happened because 15 days ago I saw the baby and heatbeat. Praying this lady doesn't know what she is doing and just missed the baby. She says if still no baby we will have to schedule a d&c. I don't want it done. What if they could be wrong? So many emotions going on right now and I have no-one to talk to that could understand.