I just did a personal test in the gym, saying that I am 22 years old, but I am only 17 years old. What will happen to make me grow taller?

That's not true.

Physiological age does not represent bone age, the most important thing is bone age. In addition, there is a certain error in the physical examination done by the gym, and there is no authority of the hospital. In fact, there is no need to worry too much about this problem. I was the same as you when I was 17, and now it's 180. Keep exercising and remember not to take some medicine supplements because of what others tell you. I believe you will grow to 65438.