Hi
Hope you will write the exam well.
No one will suggest red bull for exam energier.
Recalling is all about your repeatation of content or syallbus for number of times till you get memorized.
Also you have make yourself interested in your academics and motivate yourself to learn an subject.
Next Steps
Better focus on what your learned in the past. Dont try to read new content now, your memory will not receive at the emergency time of exam.
Health Tips
It's an kind of lesson, learn from this. plan your own time table for further exam and do well.