Help! 17 Fear Of Receding Hairline/male pattern baldness

[JASG]

I'm 17 and I've had a widows peak for a long time, but recently I've started noticing some hair falling out, nothing like shedding horror stories but maybe I'll go to sleep with damp hair and wake up with 10-15 hairs and random hairs will fall out during the day. For the past few months I've noticed more miniaturized hairs in my hairline and overall thinner hair. My dad is 52 and he's still got a full head of, albeit thin, hair. His brothers all have hair except the oldest who's 65. On my mom's side, my grandfather is 70 and still has plenty of hair. I started using Nizoral 2% shampoo a couple of weeks ago but am thinking about propecia. Any suggestions? Please