Will my penis still grow?

Okay so i am 15 years old...i started to grow pubic hairs when i was like 13 years old, my voice is sorta deep, and i am a little bit over weight...i can also produce sperm...but i feel very small down there...small it is like 2 inches and erect it is like 4 1/2...i really want to know if there is something wrong with me...it bugs me all the time it is on my mind most of the time...will i still grow? is this my final size? is this bad for my age? is there anything i can do? and length is not the only problem i have no girth. I seen something about a micro penis that's not what i have right? can someone help me please...am i the only one with this problem?