baby going to be a big baby again feeling worried

I have been for my last scan before baby is due on Feb 3rd my first baby boy was 9lbs10 and was a week over due it was a difficult birth and very scary they have been keeping an eye on this ones weight I was told today he weighs 7lbs13 with two weeks and two days to go I'm so worried he is going to be massive again thought they might have induced me this time has anyone else had an ultrasound and babies size been completely wrong