Thanks for your query.Based on the facts that you have posted it appears that you have problem of getting night emission.
This is normal at the age of adolescence to get night emission.
The premature ejaculation
is defined as ejaculation that happens within one minute after one penetrates vagina during intercourse with a female partner and not applicable while masturbation
The Penis of 2.5 to 4 inches in length in a flaccid state and of 4-5 to 5.7 inches on erection is considered to be normal.
If your sperm count
and morphology of the sperm is normal there is no reason why you should not have a child.
Please consult qualified Urologist
for evaluation and further treatment.