Right now, as far as I know, it's been illegal for decades in America to implant artificial hair in to someone's head. And, for good reason: no matter what type of artificial hair people have invented, having it implanted in to your scalp causes horrendous side effects. I think it can even be...
From my experience, I have found that only two things work: hair transplantation and Propecia. Both are expensive for someone who is 17. Do your parents have any money to pay for either of these?
Whatever you do, don't take medical advice from online forums, such as this one. Go to a real MD...