Thanks for your query.Based on the facts that you have posted it appears that you have problem of getting night emission. This is not uncommon at this age and it will not have any adverse effect on your body.
Following measure will help you to boost up your confidence,allay your anxiety
and getting good sleep.
1) Practice regular exercise for 45 minutes followed by meditation
for 1/2 an hour in the morning.
2) Take high protein diet rich in vegetables and fruits and Vitamin A,C,D,E.
3)Take anti oxidants like Almonds 5-6 everyday..
4) Avoid alcohol and smoking