Cs result feeling very disappointed

Dear all Seniors,

I GAVE CS PROFESSIONAL GROUP IVth EXAM THIS TIME.I HAVE CLEARED ALL THE FIRST THREE GROUPS EARLIER. DESPITE OF MY HARD WORK I DECLARED FAILED. I AM VERY DISAPPOINTED THIS TIME.

I HAVE GONE THROUGH WHOLE THE STUDY MATERIAL AND REVISED IT AROUND 2-3 TIMES AND I WAS FULLY CONFIDENT THIS TIME.

PLEASE SUGGEST ME WHAT TO DO?
IS STUDY MATERIAL IS NOT ENOUGH FOR MODULE IVTH? IF NOT PLEASE SUGGEST ME THE REFERENCE BOOK FOR THE SAME.

Thanks in Advance @ @ @ @