Hi there WANNAFLY!
What you have explained is exactly what happened to me....I think it is quite normal hence it being called a "group discussion"!
I am sorry to hear that you didnt get past that stage, but what you can take away from your experience, is what to expect for next time!
I guess thats just the way group discussions work! Its all part of them being able to observe how interact with everyone else! I wouldnt worry cut you losses and prepare for the next time! I am sure you will do better next time, stay positive!