18 y/o with thin hair, male mature hairline or balding pattern? Just a big forehead?

[Razgriz]

I have always had thin hair,and according to my parents, this kind of hairline. However, I am not sure as to whether if it has always been like this or not, and if I should consider going to a dermatologist. Having the side effects of some medication talked about here also scares me.

I am not sure as to when did my father start going bald, but apparently this kind of hairline and its curves could be father family side.

Is this kind of hairline something to be worried about?

http://anony.ws/i/2015/03/11/image.jpg
http://anony.ws/i/2015/03/11/image2f1e8.jpg
http://anony.ws/i/2015/03/11/imageb3e2b.jpg
http://anony.ws/i/2015/03/11/image50902.jpg

This is how I usually have my hair, long, which is why I haven't noticed or been bothered about it until now.

[lelma]

Check with Dr. Rassman's measurements to see if it's a mature hairline and see if you have thinning along the hairline.