I took my first diving class at 14. I passed the pool and class work with no problems. I flunked my open water. At the time I was a cocky swimmer. I was ranked third in the state, had been swimming since 8 yrs old, and swam circles around everyone in class. Trouble was, I could not stay neutral, and spent too much time proving to the class that I was a better swimmer than they were. So the instructor flunked me. He told me stop swimming, and just dive. Well, I retook the class, passed, and have been friend with last instructor ever since. Sometimes flunking is not all bad. If you are not ready, your not ready. relax, and just enjoy the ride.