Good Morning Doctor, I Am 17 Years Old Boy,my Height

good morning doctor, i am 17 years old boy,my height is 5'7 to 5'8 and my weight is 55-56 kg and my BMI is also normal.And,i am suffering from nightfalls since few months.Plz tell me that how can i control nightfalls?Also,i lose sperms through night falls frequently after every 3-4 days of releasing.Is nightfalls effects our height and powe of our body?And,what food must i intake in our daily routine?
Please,give me the relevant answers for my problems.