I'm not sure if I'm losing my hair or not but I have a picture of my head, and I wanted an

I'm 18 years old and my dad noticed that I had a bald looking spot on the back of my head (the crown) and I was like "WHAT?! NO WAY!" I then got my digital camera and tried to actually see what it looked like, I noticed it DOES in fact look terrible... I haven't gone to the doctor YET but I was wanting an opinion from you guys whether or not you think I'm losing too much hair. I might just be paranoid, or it might be serious, either way an opinion would help me quite a bit. Thanks.

http://img77.imageshack.us/my.php?image=...

http://img77.imageshack.us/img77/6146/27...

http://img524.imageshack.us/img524/8696/...

http://img106.imageshack.us/my.php?image...

Those are the four I only have so far, meh I feel depressed hah.

I'm not sure if I'm losing my hair or not but I have a picture of my head, and I wanted an opinion.?

its not too much of a bald spot but if you notice the spot getting bigger with no hair than yu should worry but if it dont get bigger dont worry about it

look on the positive side its right in the middle so you can hid it and only you and your dad and all of us yahoo answeres will know