Welcome to HCM
Just to psycho educate you I would like to tell you that masturbation
is a safe practice. It has no deleterious effects on health at all. Most of the males and females masturbate some times in their life. It is safe habit to get self gratification. It is not a cause of poor height growth.
Height is determined by genetic factors, nutrition, general activity etc factors. Masturbation don't cause decreed growth. But frequency of 5 times a day is high and it should be less in number because it may lead to impairment in your social, personal and occupational functioning. Try to divert your attention by Relaxation methods as Breathing Exercises, Progressive Muscle Relaxation
Spend your time of the day in watching good channels on TV, reading good books, by exercising daily.
Dr. Seikhoo Bishnoi, MD