I asked my OB if I could have another u/s and she let me. That was at 32 or 33 weeks and they said she was 3lbs5oz or something like that and in the 24th percentile.
Now I just worry she is too small, but my dr even said to take the measurements w a grain of salt. DS was 9lbs5oz when he was born, so I was expecting her to be on the bigger side, but doesn't look like she will be anywhere close to that.