Ok Im soooooo worried Im 13 years old a complete virgin and I started my period in January 2012 now its December 2012 and my period is almost 2 weeks late I was supposed to get it December 1st now its December 11th and Im super worried about it. Is this normal?

P.S I never really see my mom so I cant talk to her about this. I live with my dad so it would be awkward to talk to him about this