Hi, Welcome to Health care magic forum.
As you describe, you are
underweight, and you also need some more height, it is more important as you can grow only for 3 years more, and after that you can't gain height.
You can have improvement in both medically, so i advise you to consult a physician for diagnosis and treatment .
I usually prescribe to my patient with such symptoms injection of
anabolic steroid periodically,
protein supplements , calcium, multivitamins and enzyme preparations.
Practice
yoga, walking and cycling.Do any work in front of you,irrespective what it is.
Take more of green leafy vegetables, pulses, sprouts, and protein rich foods.
Wishing for a quick and complete recovery. Thank you.