I think putting off worry about something you can do nothing about is a good idea. Nothing wrong with being short, if that's what you turn out to be. When I was in school, one of the prettiest girls in school was under 5 ft. It really only matters if you concentrate on it.
well, you have gene from your parents. Its just a normal thing, you dont need to worry too much about it. You are just only 14, your body still growing till youre 18 ! If you want to be taller, do sport, Such as swimming or pull up ( girl can do pull up too, it work very well, it may gain you 10 cm taller if you do it daily for 3 or 4 months ) ..... when you get older and still want to get taller, you can go to place where they can stretch your body your leg longer ( sound scary huh, but a lot of girls do that ) !
don't "worry" period! it's one of the goofiest things you can do. worrying has never helped change a thing, because it cannot. it is unable to. anyhow, you will probably grow taller but if you do not, so what? you are you! among seven billion people; there is no one like you. too cool!!! spend the whole weekend celebrating (in a safe way)...;-)