Hey! I think that you might be slightly balding, but not 100% sure. Especially as you say that you always had a widows peak.
I mean you still have great density. I'm also 17 and my situation is waay worse regarding the density, but with my current regimen it is already improving. I'm optimistic. The key is to act preventative. And dont let this whole fear-mongering affect you too much! I'm on several treatments and have no side effects at all.. Although this might not be the case for everyone..