First of all..it is very important to calm urself first..and just try to remind urself..U know everything
..U are gonna rock in ur exams...u r genius!!!.. this will enhance ur confidence to solve the difficult questions with a confidence and proper mindset..!! and just do not panic....if U r running out of time...just focus on what u r doing...just calm urself..do it by remembering God!!..he is there for U!!..So this is how I cool myself Down during exams...hope u like it..and if yes.then mark it as best!!...And yes ALL THE VERY BEST!!!