You might grow, but in all likelihood, your not going to be a 6 foot tall person. So accept the fact and work your azz off.
Back in the day, franko columbo, an infamous bb, wasn't that tall, don't worry about not being tall, just go out, start a good diet and fitness routine, and you'll develop confidence real quick.
The thing about PH, AS, etc is, as most advice goes, wait until your diet is ALMOST PERFECT, your fitness routine is ALMOST PERFECT and you know what makes you gain, what makes you lose, and how long it takes before starting anything.
Too many people start taking crap before they ever really know how to workout or eat. And when that stuff makes them sick or it doesn't make them go from 150 pounds to 250 pounds, they get all pissed off.
There are no miracles. PH, and esp AS, def work wonders, but you have to eat well and train hard, or it's just gonna be a waste of money and a gain of side effects.