Baby measuring big at 20 weeks

MK
We had our 20 week scan today and were told she is in the 99th percentile and a big baby...this makes me nervous because I really want to deliver vaginally. Has anyone else experienced this and still were able to deliver vaginally? I know babies grow at different rates and she could slow down, we have another ultrasound in a month to see if she's still growing the same. Just looking for some reassurance