OP, I sincerely doubt that the Clonazepam (Klonopin) you've been prescribed is doing "nothing". Although Benzodiazepines are powerful sedatives, anxiolytics etc., their effects can actually be quite subtle. Also, try to follow me here, there is a cyclical nature to Benzodiazepine intoxication. What I mean is that, as the Benzodiazepine numbs your senses, you can actually become less cognizant of just how intoxicated you are. In fact, a major hallmark of Benzodiazepine intoxication is the user's inability to realize just how impaired they are.
So, in short, you're probably fairly intoxicated from taking 8mg of Clonazepam and are just unable to grasp what's happening. It happens to the best of us and really, this effect is part of what makes Benzodiazepines so dangerous physically, socially and psychologically. Whatever you do, don't take any more pills. It can only lead to trouble.