Ash,
Are you a PhotoReader? From what you have been saying I get the impression that you are not. Because 'reverse sweep' isn't reversed to a PhotoReader you've already taken in the information, the questions are the activation questions and superreading and dipping is for the answers. It's a major benefit of activating manually to completion at least one book a week. If you're not a PhotoReader don't worry about learning to become one now. For the benefit of future students facing similar exams I make that point.
For you, if nothing else, in your meditations start telling yourself you have plenty of time and your mind picks up the answers quickly. The danger here is you're focused on not having enough time. How differently would you approach the exam if you knew, really knew, that the allocated time was more than enough? Look for and go for that feeling because that is a reality.
Alex