Ultrasound today - no exciting news:( looking for advice

Grace

Went in for my first ultrasound today. App shows I was 5 weeks 6days(almost 6 weeks). Gsac is 2cm(7 weeks - bigger than expected) ysac is 0.57cm. However no embryo. No bleeding yet.. doc asked to come back in a week.. anyone experienced this before? I am so anxious now.