If anyone is really worried about not getting x no. of A* grades it really doesn't matter if you don't.
I got my GCSE results last year and I got 1A* 5As 5Bs and a C when I was expecting nearly all A/A* and I knew I could achieve it so I was pretty upset. So this year I pulled my finger out and actually got some work done and on Thursday I got my AS results which was 5As in Maths, Further Maths, Physics, Economics and General Studies. My UMS average was so much higher than I was expecting that I am now looking into applying to Cambridge for Economics.
So if any of you don't do as well as you were expecting next week, all is not lost!!!