I hear where you're all coming from but don't waste time on anxiety!
Use the study program you have decided upon & work your way through it systematically. Then do as many practice questions you can up until 2 days before the exam (no more than 75 per day though because your brain won't take any more in after that). The day before go out, see a movie, shop etc, then get an early night.
Well before make sure you know the way to the exam centre (& alternatives should there be traffic/transport problems) or book a hotel room nearby - really worth doing if you have young kids who may wake you during the night &/or if you have a long commute.
Learn a relaxation technique that works for you so you can use it if needs be before, during & after the exam.
Learn those strategies for answering the questions & above all be positive - you know the stuff - you just need to prove it!
Think priority - if you could only do one thing for the patient before you walked away then what would that be? Think ABC's but watch out for those red herrings - the airway patient might still be stable - is someone else actually less stable? Remember Maslow, it might help you decide which is the right answer. An "initial" thing is usually an assessment answer. If there's a nursing option as opposed to a medical one it's probably the right thing.
Hope that helps - now go beat that beast!!