Measuring big? Your thoughts? Experiences?

Ok, so I was testing like every other day and finally got a positive on April 11th. The test said 1-2 weeks past ovulation which would be 3-4 weeks past LMP. I know these can be wrong but I think it's dead on because I was temping and o'd on April 1. Today I had my first dr appt and I measured 9 weeks. Did this happen to any of you? What were the results? The doctor said maybe twins but I have no family history for that. (The pic is from April 11)