35 weeks today

Had ultrasound today 2nd in the past week and the baby is measuring 39 to 40 weeks for size and is estimated at 8lbs 11oz. His head measurements are 40 weeks and 5 day which is nuts. I know late ultrasounds are not that accurate but to be off by 4 to 5 weeks is nuts we think he is more like 37 week. Already 3cm and 50% thinned out but his is -3 station so way high still now to get him to drop if you all have any ideas let me know this big boy needs to come out.