Dear All,
May I ask if I fail the PMP exam, how long will it take to apply for another exam?

Another question is should I go and take the exam, I tried the following test but
still not very confident in taking the exam

1. CertChamp
[154/200] [77%]

2. http://206-free-pmp-exam-questions.blogspot.hk/p/questions-1-20.html
[170/206] [82.5%]

3. Andy Crowe Mock Exam
[177/200] [88.5%]

4. Headfirst
[172/200] [86%]