Open Question: PLEASE HELP! Why didn't it come?

My period GENERALLY comes right on the fourth. I'm not getting ANY symptoms, just a bit of breast tenderness. No nausea, no headaches, etc. I usually have these for a week before my period, and here we are three days before my "due date" and I'm not having ANY symptoms. I'm really worried, I'm going on holiday next week and I want it to come before hand. Is me being worried stressing me out enough to the point where it'll be late? I'm 14. Thanks:)