Is the world really going to end on May 21st 2011?! I'm really scared and don't know what to do!?

Ok my little brother told me this a couple days ago and I really didn't really believe it. But after he told me that, I went online and searched it up on google and I saw Harold Camping or whatever his name is reason. His reason didnt really make any sense to me. I no that the bible said that nobody knows when the world is going to end but got. It's like I don't believe it but part of me sort of still do, just alittle. I don't want to believe it, but the thought of the "world ending" is scaring me. (and I get scared easily) I even told my grandmother about it and she told me "don't worry about, this guy doesn't no at all." But like I said, all this guy did was do some math and figured this out even tho he failed in the past years. So I need some help guys, I need someone to get me pretty much back onmy feet and continue on my regular life and not worry about some crazy guy "warning people about the end." I just need some positive comments on this guys please I need this help alot. Thanks! :)