Will the world end in 2012?

I know this sounds silly but i am a worrier i worry about everything and anything, i take panic attacks and im so afraid to die that i hardly sleep..yeah in short im a freak!! Anyway this is current,y annoying me about the world ending in 2012?? does anyone know of any FACT surrounding this? Asteroid is what i have heard>? Plz also don't say No if there is some fact id rather know..although on a serous note its a big problem in my life rite now so plz plz help! Thank You