Help! Receding or Maturing hairline!:confused:

[bcheslop]

Ok i am 22 years old. I have noticed the oast couple years my hairline is going back at the corners. when i look in the mirror i can see that there are some hairs that are a good distanbce away from others. My dad is balding(some hair left) at age 50, my dads dad is completely bald, and my moms dad has a full head of hair. I need to know if this is a receding hairline or maturing and if i should take action such as medication to prevent future loss. Thanks!
http://img.photobucket.com/albums/v716/blnk182delonge000/P5264549.jpg
http://img.photobucket.com/albums/v716/blnk182delonge000/P5264548.jpg
http://img.photobucket.com/albums/v716/blnk182delonge000/P5264550.jpg
http://img.photobucket.com/albums/v716/blnk182delonge000/P5264537.jpg