Further Along?

Victoria
Has anyone ever been further along than what the doctor was telling you? I'm right now 32 weeks, 33 weeks tomorrow. 
They couldn't get my due date set right in the beginning and I was so confused. Now she's telling me he's measuring big. I honestly don't remember the day of my last period. So that throws everything off and I've only had two ultrasounds. Original and gender and won't have anymore..