Baby Size

Alright ladies.. I had a monthly appointment last Friday, a day before 17weeks. My clinic has handheld ultrasound machines so I’m a little lucky & get to see babe at every appointment. While my midwife was checking the baby she made a comment about how baby looks to be about 12oz. Now she didn’t measure baby, but I have a feeling she knows what she’s looking at... I’m panicking because babe should only be 5-6oz right now!!! What are the odds that baby is that huge? If baby is, do you think they’re off by like an entire month on my due date?!