Uhm - honey - there's nothing you can do to grow faster. The only thing you can make sure to do is to eat healthy and enough, so that you don't stunt your growth at all - it is a real risk, so make sure to eat smart and right.
Please trust me when I say that the only thing that will make you taller is corrective surgery, where they break your legs and stretch them with braces over months on end. This is a long and painful procedure no sane doctor would ever consider for someone of your height.
Consider the height of your family (how tall are they, how tall were they compared to their peers when they were young, etc.) and you will have an idea of your own approximate adult height.
If you have gotten your period, you will usually stop growing eighteen months later - check out the web page below for further information.
Seriously - you might as well try to grow a third leg - you will get just as far, and be equally frustrated. Focus on keeping your skin clear and vibrant, your body strong and healthy, your posture straight (which will make you look taller), and your mind happy and healthy. If you are to oshort for some modelling - make up for it in other areas - develop a good portfolio, take your time, you are still quite young :)
Wishing you the best of luck and the five inches you so desperately want, -c