Measuring 3 pounds 3 oz at 31 weeks.

Cierra

Today I had an ultrasound to measure the baby and they said she was weighing 3 pounds 3 oz(at 30+6) I thought that was good cause that’s what my tracker says she should be weighing at 31 weeks but the doctor at the ultrasound office didn’t make me think that. The doctor came in and told me she was only in the 12th percentile but that they usually don’t worry unless it’s below the 10th percentile then proceeded to say she was weighing small. My obgyn said that being in 10th-90th percentile was normal and she wasn’t worried about her weight. So now I’m concerned that she’s to small and isn’t growing right...... Did anyone’s baby also weigh “small” but is perfectly fine?