That's what I thought. If you are 6'2" 190 pounds, I doubt you have delayed puberty. I had it. When I was 15 I was the shortest in my class with a baby face, not even one zit. I got a bone age test done, results showed 12.6 years old; so yes, I was delayed.
If you are, let your body alone. DO NOT INTOXICATE YOUR BODY WITH CHEMICALS AND MEDICINES. Doctors are dangerous. I am thankful now that I was delayed, because my body has always looked healthier and in better shape than those who developed fast and now are old and fatty.
Take care of your diet and lifestyle. Answer is mother nature, not medicine. Unless you go to ancient medicine, that's valid too.