Scoliosis or just something else? Back problems?!

Noticed my hips and sides seem unsymmetrical, so I instantly thought I had scoliosis. But my back and shoulders seem pretty straight, the line going up my back is straight, my legs are pretty much even, no back pains, shoulders are evenish.

Here is some pictures:

http://s140.photobucket.com/albums/r32/s…

I'm 18 year old male in good health, just a bit worried I have something wrong