The weight estimate in scans is not always accurate.
My SIL had a scan on one day where everyone DR and specialists said the baby was not more than 4 lbs and they wanted to wait to induce. (She had high blood pressure)
The next day she went into labour on her own and delivered a healthy 6.5 lbs baby girl.

So they guessed wrong and panic (ed) everyone for nothing. I am sure your baby will be fine.