Well, I'm screwed..
I thought the exam started later tomorrow (like Paper Two of English), so as usual, I procrastinated like hell tonight and figured I could do some study in the morning, only to find that it starts at 9:25. Although PD's pretty straight-forward and you can often rely on general knowledge, there's still a lot of content you need to know, and the fact that I've studied for one night this entire year (Trials) doesn't help with that. It's a shame, I could've at least done okay, but there's not much I can do now. No point worrying though.