You stunted your height because you didn't sleep at night when you were young and you didn't consume diary your mom gave you.
Now you're short, 2-4" below average normal height, 2-4" below what you were supposed to be, for the rest of your life.
Again, because you didn't want to sleep and consume diary.
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I'm pretty sure your height is mostly determined by your genetics. Sleep and nutrition plays a minor role. In saying that, 5'6" seems a pretty decent height. Unless you dream of playing professional basketball, I think you'll be just fine.
It's not the end of the world for you buddy. So get a grip and fuck*n move on.0