@Malione,
It happens to the best of us.
1) There are medical treatments for baldness. I have never even considered using them, but you should talk to the doctor.
2) In my opinion...
the best thing to do is to own it. Don't part it. Don't cover it. For God's sake don't do a comb over.
Confidence is sexy. You are who you are. I have a short hair style (and bald on top), I tried the shaved head thing... which doesn't work for me. Just be who you are.. it isn't that unusual. People care much less than you think they do.
I get it that 17 is a little young, but in 5 years you will have lots of company.