Measuring 3 weeks ahead - anyone have experience with this?

I'm currently 30 weeks and at my appt Monday they found out I'm now randomly measuring at 33 weeks. So I have to have an ultrasound on Sunday to check his growth. My Dr wasn't overly worried but he did just briefly mention (in passing) induction or increased risk of c section etc. So of course I've gone to Dr Google but there's not much info out there relevant to what I'm going through. I'm just wondering if this makes me likely to deliver early? I've always had the feeling he would come early but I was only thinking like two weeks. The only two people I know who went through the same thing both had their babies early (2 and 3 weeks). I'm sure I'll feel better after the ultrasound but I'm very anxious.