Black Spot/Growth in Ultrasound?

Tegan

I had a 4d Ultrasound today for 32 weeks. Baby boy was said to be fine and no one showed any health concerns. I was super excited because I haven't had any image ultrasounds besides seeing in 2d but when I showed my significant other he worried me about this black spot on his head. What is this? Does anyone else have this on their pictures? I feel like I've done something massively wrong and I literally want to just cry.