I am19 years old and I have not seen growth in my body. My friends have all grown big and i do not match with them. my height has been 5.6 since 12th grade and i have been osing weight. I currently weigh 51 KGs. I have been a vegetarian as well for my whole life and i smoke 2-3 cigarettes/day. PLease suggest me what can I do to increase my height and weight.

Thanks