May 3 is must a few weeks away. Expose yourself to as much Spanish as possible in the last few days before the exam. Spanish language newspapers and television programs help. Watch some of your favorite movies with the Spanish language track on instead of English. Order in Spanish when you go out for Mexican food. ANYTHING that will let you hear and speak Spanish will be beneficial.
ALSO remember...the exam is at 8am so get some sleep the night before and eat a healthy breakfast!