Hi I think I'm going through puberty I am grow a little bit of pubic hair but my Penis isn't growing why nOt?

How old are you? Puberty and physical/sexual growth end around 21 or 22. Are you close to that?

You're still young. Puberty occurs between the age of 9-14.. lots of years to wait:) the first sign of puberty is the enlargement of testicles not the penis so relax.