I too was another one that from 32 weeks measured 2-3 weeks ahead of my dates! As it turned out she was induced at 40 + 10 and I still debate that the two of us were not ready for her to come out because we ended up in a c/s... The measurements they do and even the ultrasounds can be completely off the mark hun, so many people have been told they will have a big baby and they end up with a 6 or 7 pounder.
Izzy was 8lb 13oz so not huge but a bigger bub I guess.
The link Limeslice has posted is great and as someone mentioned, our bodies very rearely grow a baby that is too big for us to birth! Don't feel pressured into anything you don't feel comfortable with, do you research and take the articles with you to show the Dr!
Good luck hun!