Am I balding? Or just mature hairline... 18 years old

[svere11]

I'm 18

My mother has no balding in her family

My dad is bald but ONLY started losing hair at 38ish and nobody else in his family is bald

I have like a NWI but it can possible be because of my moms hairline which I got... its very broad and high.. I don't have those edges like most people have on their sideburns.. brad pitt has them or the "triangles" its just flat and goes up to my hairline

anyway someone please tell me if im balding im ready to go on fin or propecia I really dont want to be bald by 20 years old

anyway here is my hair from front and rigth and left side.. also those hairs are how many hairs fall out when i pull on my hair 5 times

http://imgur.com/guAim5L,BzTMUBW,4AKaUsI,CoMFTDm#0

someone please tell me quickly so I can get some medications before its too late