30 weeks and induction date scheduled

My baby is due February 1st but my doctor scheduled me this week for an induction January 18th. Im excited but super nervous at the same time my pregnancy is high risk due to previous health complications. My ultrasound this week should the baby measuring around 4 pounds and 1 ounce my biggest vaginal birth was 6 pounds 11 ounces. My doctor kinda looked at me crazy when I told her I wanted to do a VBAC (last baby was a cesarean birth, baby weighed 7 pounds 4 ounces). Any mommas measurements been wrong. I can’t see me delivering a large baby due to all my babies being in the normal range. Sorry for the rant I’m excited but nervous also.