i too am having an u/s on the 22nd. i went back and forth between thinking i should get one and not feeling like it was necessary. but someone mentioned that since i am unsure of my dates that it could be important at the end, to know if i am 35 or 37 weeks should labor start early. since i am having a homebirth i figured i would like to know when i need to worry, yk? so i went with it.
i had a ton of u/s with the twins. 2 early ones and at least monthly from 16 weeks on, and as frequent as twice a week toward the end.
eta: no idea on the fundal height. could it just be that this is not your first pg? i know the bump starts stickin out sooner for subsequent pg. sorry, i hope you aren't too worried about it, and if you are, please talk to your mw/dr. hugs.
~helen~ mama to 5 yo twins jonas and micah and my 2 yo baby boy eli