No, but a severe blow to the testes could effect the process of puberty.
The vast majority of penile growth occurs during puberty.
Sizes will vary
I should hope you have hit puberty and theres something up with you!
hit puberty
It depends. If you hit puberty early like that, then it will stop growing when you are 16 and will be around 8.5-10 inches. Nobody can say for sure. If your penis is large when you enter puberty then it will grow less during puberty. So if it is small it will grow more during puberty ! The average adult size erect is 6" so you have nothing to worry about.
Because you have not had a growth spurt during puberty most probably. When you hit puberty you start to grow quicker in spurts of growth. The penis will keep growing with you until around 20 years of age.
this is because you either havent started puberty or your basically have to wait
Yes
When you hit puberty.
13
You first must hit puberty.
everyones different it just depend on your genetics and your penis