And remember, http://www.youtube.com/watch?v=1NvgLkuEtkA.
[censored]. It's a good thing 5'2 isn't short, then.

I don't think you need to worry about it just yet, OP. 5'7 is a perfectly okay height, and even if you are a bit shorter than other people in your immediate surroundings, who gives a [censored] anyway?

Just think positive, at least you won't hit your head on doorways and stuff.
EDIT // Then again, I have a second cousin who's almost 6'9 (I was I was kidding). He doesn't complain about much, just cars and doorways being too small. I think it's just about the attitude you have towards your height, really. An extreme in either direction can cause some unpracticalities in your daily life, but that doesn't necessarily mean you should be unhappy about it.