Do You Believe The May 21,2011 Prophecy?

I am a Christian and I am 15 and a girl.However,this whole May 21,2011 thing scares me and it's supposed to be this month.Fellow Christians,do you believe this?I always thought that no man knew the time or the hour that Jesus will come back.And although the time is getting closer,I personally don't believe it will be May 21,no more than I believe it will be December 21,2012.Think about it,when it's May 21 in the US,it's already May 22 in Australia and still May 20 in other countries.Also,Harold Camping,the man that predicted this,also predicted the Rapture in 1994 and of course,it didn't come.So he was wrong once so I thought that makes him a false prophet.But I want to know other Christians' opinions.Thank you in advance.Does anybody else know of any other false prophecies that he has made?Is it safe to say that he is a false prophet considering he has already been wrong once.Also,does anyone believe the 2012 prediction?There's only 17 days left and I guess I just want reurance.