What in the world is up with my ultrasound?

Justice • son born 12-9-16👦 missed miscarriage 7-12-17 at 10 weeks👼 blighted ovum 2-5-18👼baby girl born 11-25-18👧

My baby girl at 15 weeks 4 days. But what is behind her head ? And the ultrasound tech said that the thing next to her hanging down was the placenta?