Geography is a bore, do History instead.
Oh god, +1.
But if it's coursework time, don't worry, It's only worth 10% of the mark, so the difference between a C and an A* (in your overall grade) is only 5%: about the same as 7 marks in your exam.
I got a D in coursework, but still managed an overall A in my mocks.
On the other hand, I was half a mark from a star

So er... I have no idea whether you should worry about it. If you are A* material an excellent exam result will easily take you into an A*, even with shite coursework. Don't panic unless you're borderline C/D and you need it to push you over the grade boundary.