Due dates changing

Rebecca
Anyone have their doctors change their due date? I went in for a 28 week ultrasound today and they said I was measuring 29 weeks and 6 days and they changed my due date to August 11 from originally the 23rd. Granted I haven't actually seen MY doctor yet, I see her next week and she will go over the ultrasound results with me but it's kind of frustrating for them to change my due date this late. Just because the baby is a little bigger than normal at this stage I feel like doesn't necessarily mean he's actually over a week older gestationally right? If he was measuring on time up until this point why just up and change the due date instead of just saying he's a little big. I'm just worried that if I end up going to 40 weeks+ they will induce me because of this new due date when in reality I still would have almost 2 weeks left.