Even in adventurous positions

(maybe my body is not quite right. I don’t smoke nor take drugs, but my health is simply “weak”) When I go on Internet to search for height, there are sooo many threads that I don’t even know whether the methods and pills they provide are true or false (and I am broke, have no money for the books pills lol ) Is it still possible for me to grow “up”? I am a 19 years old student. Everytime I go to elementary school to pick up my sister vibrators, I feel depressed and ashamed because most of the students there are taller than me.