Ultrasound measurment and belly measurment?!

K
Hi everuone. So on my last check up i was 24 weeks and 2 days. Once doc measured my belly she said the baby measure 22 weeks so ordered ultrasound. The lady whos doing ultrasound told me i measure 25 weeks and 2 days and the baby is little bit bigger. After that j havent seen my doc. Im so confused. Which one is more accurate? ladies belp