How far along am I?

Emily • 22, Married to my love🌹Army Wife 💍 Angel mom of 7

According to my LMP I'm 8w2d. But according to my ultrasound I'm 6w2d but I think she measured wrong or baby was in a weird position. And according to when I beleive I Ovulated, I'm 7w2d. LMP Aug.11. Negative blood test on Sept. 7th, Positive home test Sept. 15th. as of Wednesday Oct. 4th my hcg level was 19,000. I'm so confused.