We had a 12 week ultrasound a few weeks ago, and I didn't think anything of it at the time, but being a first time mom the "jumping" ultrasound now has me a little worried. The back of her head looks so big and now makes me worry that I didn't have an NT scan done, although I'm sure it's just motion blur, since she was jumping like crazy for 10 minutes straight. I also posted a "calmer" picture that was taken toward the end of the visit. Any insight?