... years, since early 10th grade. Over the years i haven't done anything about it cause i thought, all i have to do is stretch but stretching isn't helping at all. In the past my doctor said my estimate height might be 5'10 but now i'm only 5'6. I used to be a pretty good height compared to others in middle school but i've noticed ever since i started high school back in 2009 i am pretty short compared to other kids. My brother is 15 and is only two inches shorter than me, in the past i used to be 4 to 5 inches taller than me. Can you please help me with this situation, i think it has to due with my back?