Totally Freaking Out

For some background I am currently 34 weeks and 3 days without GD. I had one of the fun ultrasounds yesterday and got to see my baby boy in 3D. At the end the girl asked if I wanted to know his weight and I said sure. She measured him and he is 3 WEEKS AHEAD! She measured him at 6lb5oz. She didn’t believe it at first and remeasured but it was the same. And yes she knows what she’s doing her normal day job is a ultrasound tech for high risk pregnancies. I don’t have another appointment with my ob until next week. Should I be calling them on Monday and letting them know? Or should I just wait? I’m totally freaking out because I’m only 5’ on a good day. Im a tiny woman. The thought of delivering a 9-10lb baby is mortifying. Also for other moms who had babies measuring ahead did they come early or did you just end up with a big baby.