Thanks for your query.Based on the facts that you have posted it appears that you have problem night emission,
This is common at the age of adolescence and nothing to worry about.
It will get resolved of its own without any medications.
Following measure will help you to boost up your confidence and getting good sleep and not getting emission.
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
3)Take anti oxidants like Almonds 5-6 everyday..
4) Avoid alcohol and smoking