Huge baby!

I'm 34 weeks today and for most of my pregnancy I've been measuring ahead. First only 2-4 days ahead but at my ultrasound today they said she is measuring 2 weeks ahead! Her estimated weight is 6 pound 6 ounces! Holy guacamole! I mean I'm glad she's healthy but I really want a vaginal birth so hoping they will induce me 2 or 3 weeks early! Anyone else find the ultrasound weight measurement to be accurate? They told me it could be plus or minus 2 pounds. I don't want to push out a 9 pounds baby and at this rate it's looking like that's how she'll end up! My sister and I were both 8.5 pounders. I was really hoping she would end up at like 7 pounds. Oh dear lord!