Threatened miscarriage

Dakota

I had ultrasound on 3/4 they said fetal heart rate was 101(normal for 5weeks 6days) below.

Then today 3/27 I was told there was only a yolk sac with no heart rate no fetal poles. I haven’t had any bleeding or cramping & still having pregnancy symptoms. I’m so confused && so sad.

Has anyone else been told they were threatened miscarriage ?! Or experienced anything like this?