Around 31w with DD1, I was measuring ahead but she was in a funky position. My dr figured that it was just her position but wanted to be sure, so he ordered an u/s where she was spot on.
I would question a dr that told you you're eating too many carbs and making LO huge. That seems really unprofessional to say it in that way, unless you're paraphrasing his/her intent.
She said I'm eating too many carbs and may have said "big" instead of "huge", but no paraphrasing here. I was about a size 14 when I got KU so I'm wondering if the chub on my belly is effecting my fundal height. This was my 1st fundal measurement.
I would *guess* that 1 measurement isn't the be all, end all. I would see how you progress in the future before you start stressing about it.
And it still seems like a d!ck move by your dr. That statement wasn't nice nor meant to be helpful. Some larger people have small babies and vice versa.
Oh, and even if your insurance says they cover 1 u/s, that doesn't mean they won't cover more if they are medically indicated. We were under the impression we only got 1 with DD1, but once my dr ordered the one at 31w, it was covered too.