Well, there's that! You just noticed, your penis is just beginning to grow. But I already answered your question:
Originally Posted by Apocalyptic_Storm
You just started puberty a few months ago, and it'll take some time for puberty to end and for it to grow I.E your penis. Puberty ends in the late teens and early 20s, so you have plenty of time. Don't worry about it, it will DEFINATLY get bigger over time.