Well, I did not think myself taller, but I went from 5ft 2 to 5ft 4 thanks to regular exercize,stretching, and taking l-ornithine and l-arginine, certain amino acid supplements are known to give a little growth boost. Give it a whirl, it is harmless. You are also 17 and still growing too. Some people are not fully developed until they are in their early 20s