Doctor right or wrong??

Jessica • Hello! This is my first pregnancy , i honestly thought i couldn't have kid's but my mom always said it will happen when you meet the right person! && i have ! I am blessed thank you LORD 👆👆👏👏 💜💋
The doctor said I was 10weeks 5days when I saw the baby, but I checked the sonogram & it says 13w1d(LMP) meaning what? That's two weeks off... Could the doctor miscalculated?