There isn't any way you'll grow naturally now, so if you're really hell-bent on it, there is an incredibly expensive, incredibly painful procedure that entails breaking your leg bones and then stretching them as they heal. I wouldn't want to do it.
I had the bone-breaking and stretching procedure done on one leg as it was shorter than the other, and that was about 2 inches. It is indeed time-consuming, painful, fraught with side-problems and very, very expensive if not done on NHS (I heard the equipment alone was worth �10,000). Just in case you were wondering...
I had my leg lengthened too when I was 12, mine was 5 cm shorter than the other, I ended up getting an infection and having a bone graft as I lost all the new bone growth. The Fibula is now permanently bent and my knee mishapen, I can't kneel down on hard surfaces because of this. Think very carefully about this procedure if you don't really need it Navin218