Drugs and gadgets don't do anything to change the size of your penis. The company that ran the ads featuring "Smiling Bob" to promote "Enzyte," the penile enhancement drug, was fined 2.5 million dollars for false advertising and failure to honor money back guarantees, so don't fall for that.
You have about six years to go until you are fully developed. A lot can change in your growth during that period of your life. The two things that affect penis size are your DNA and the amount of fat on genital area your body. Stay in good physical shape and you will be fine.