Trust me, don't worry too much over GCSEs.
I was the typical kind of worrier who worked hard but felt the exams were really unfair compared to the past papers I'd done. I thought I'd had D's in my results and didn't have many hopes of going to 6th form.
In the end, I got:
A*A*A*A*,AA,BBBB,CC, PASS
I suppose if you don't worry so hard and you just stay safe in the knowledge that you've worked hard all year, then you'll be okay on results day. I'm very proud of myself, and I hope you lot will be two.
Best of luck guys! x