How many weeks does my baby look?

AnaD๐Ÿฐ โ€ข First time mami & Papi, waiting for her Moon Princess ๐ŸŒ™๐Ÿ‘‘โœจ
I did the math and know the day we conceived. To me and baby is 9 weeks and 3  days.
They do it by last monthly period and tell me the baby is 10 weeks!
I compare my baby to other 10 week old sonograms and I personally think my baby looks younger .
What do you girls think? Thank you! 
My first little blessing ! Can't wait to meet him/her!๐Ÿ˜๐Ÿผ๐Ÿ’‹๐Ÿ˜‡