Piano exam

It was not good, I am only 40% confident that I can pass, the examiner was smiling but I know deep inside him he was thinking that I did not do well at all!! My scales wasnt as safe as I thought, exam pieces was good at first but when it reached the last one, I screwed the 2nd part! I got alot of wrong notes so I asked whether I could restart the piece but he said can only continue from the beginning of the 2nd part, I was sooooooooo nervous, my fingers were trembling like crazy..how to play properly?? I felt like crying..I realllliii hope I can at least pass, 100/150 is pass, plz.. I am scared.. =( i will pass..i will pass..