Early testing

Hi there, currently in a worrying state of mind and hoping someone might be able to help! I'm 6w2D. When I was 5w1D I had my initial blood test. I got the results yesterday (6w1D) and my doctor said that at 5.7 (I'm in Australia, this is the only numbers he gave me) it was a little high. Just wondering if anyone knows the Australian levels. Exactly how much higher are my? And when I do the glucose test what do you think my chance of coming back positive for GD is? Thanks!