28wks & baby in 90th percentile for growth

Hey there, so just had another anatomy scan & placenta check for baby. I'm currently 28wks & was told that baby boy is in the 90th percentile for growth. This is my 4 baby & my last one was 8lbs. OB said they'll perform another u/s at 36-37 wks to see where he's at & that there is a possibility they may talk about me having a c-section. That was the part that made me anxious. All my previous deliveries were vaginal & would like to do my best to avoid a c-section. Has anyone gone through a similar situation?