I need to get shorter, help!?

I'm a girl and 5'11'' tall. Finding pants, tights, long enough shirts, etc is a struggle for me. I'm disgustingly knock kneed now too from having crappy posture from always leaning over to hear what people are saying, or to reach things sized for normal people. I'm so tired of being a freak and not being able to indulge in high heels and regular jeans like normal girls do (my inseam is 34") is there any hope for me?? Obviously I'll live, I'm only 19, but it still sucks being stared at EVERYWHERE for being a freak and so tall. They make reconstructive surgery for burn victims, is there surgery for my condition too? Can you even recover from it? Is it expensive? Help :((((((((