I'm sitting this exam along with the French A2 the week after. I'm feeling pretty good as I haven't fallen below an A/A* all year, however I do worry that nerves in the exam will get the better of me. To prepare, I've done the past paper, and have just been immersing myself in the language whilst revising key vocabulary. I don't believe there is much more you can do, if you've put in the hard work and effort over the 2 years it should pay off.