It's a good thing, for now. You're probably not done growing yet, don't despair! I didn't reach my final 5'6" until I was 18. My Dad went in the Army just after he turned 17, (he graduated high school a year early, so did my mom) and so grew more than an inch during Basic Training, so when he finally got to wear his "dress" uniform the issued him when he joined, it didn't fit anymore, and he got in trouble for it!