What now?

[hrpqn]

Hey there, Just recently cut my hair shorter and it seems like something serious is going on here.

http://imgur.com/wilNnbg

I have noticed the temples changing a long time ago but now it's quite horrible to me. I am still able to hide it quite well as you can see from the two bottom pictures..

My dad is bald and so are both of my grandfathers.

I'm a healthy 18 years old.. what's the treatment or at least the possible slowdown of the hairloss in my case?

Thanks