Worried mama

Mrs P • Wife & mummy to a 10 month old. 👼🏼 11th of Dec 2017 💔👼🏼
I'm 34 weeks 5 days... yesterday I went for a growth scan. She's growing well and on track except her tummy is measuring 4 weeks ahead... estimated weight was 6 pounds. I'm really worried about her tummy  4 weeks ahead seems a lot. Anyone had a similar experience with friends or previous babies?