What is that?! 5weeks 5 days

Jessi

I had an ultrasound done today. I got to hear the heart beat for the first time. She quickly measured the baby (right) and said I measured 6 weeks and 1 day. She did the whole scan pretty quickly. Not even 5 minutes long. When I got him I was looking at the last slide of my ultrasound and noticed another grey blob off to the left. What do you think it could be?