i agree the doc's "baby too big" thing is total BS. like others said, size estimation is wildly inaccurate. and i know LOTS of women who have had babies over 10 pounds at home, one was 11+ lbs, and the labor was hard and long, but the kid got out and was fine. she was a real thin girl, too.
my own two have been over 8 lbs, home water births. your body is made to do this; an 8 or 9 lb baby is NOT "too big".