18 and balding or adult hairline?

[Paranoid]

http://i1159.photobucket.com/albums/p63 ... 020PM5.jpg

http://i1159.photobucket.com/albums/p63 ... 020PM3.jpg

http://i1159.photobucket.com/albums/p63 ... 1019PM.jpg

http://i1159.photobucket.com/albums/p63 ... t631PM.jpg

http://i1159.photobucket.com/albums/p63 ... t248PM.jpg

http://i1159.photobucket.com/albums/p63 ... 041PM3.jpg

So is it paranoia? You can see my scalp under direct light and I am not sure if it is just because I have thin hair or I am thinning. My temples are straight and I may have a widows peak because I dont think its receding but it looks like it.