Can Anxiety , Stress , And / or Depression Cause Hair Loss ?

This is a story and question for all psychologists, hair specialists, dermatologists, and anyone who is knowlesgable of the situation.

My confidence is really shot right now. My hair started thinning back in late 2003. I'm still thinning (2007). I pretty much shave all of my hair off and stay bald since it doesn't grow anymore than an inch. I've now accepted the fact that I may never have my hair back again. BUT, now it seems that my eyebrows are going through the same problem. Though there isn't anything noticeable, I feel I had more hair in my eyebrows before than I do now. As I feel on my eyebrow hairs, they don't FEEL as thick as they were before. Now if my eyebrow hairs are starting to thin, then this is the last straw. I just cannot accept it. I'm sick of this. This is the worst feeling in the world.

I don't understand why i'm losing my hair NOW at 25. My father is 47 years old and eventhough he is thinning as well, he has way more hair than I do. He started thinning when he turned 44. He has very bushy eyebrows and I did too. But now it seems i'm thinning there also. What kind of crap is this???? Lastly, NO ONE in my family is bald. Just my father and my uncle who are just now thinning hair.

Now as i'm looking, it seems that no one knows whether stress and anxiety can in fact cause hair loss or not. I would like to know if it does because my doctor found NOTHING PHYSICALLY wrong with me.

I became an obsessive thinker after my ex girlfriend broke up with me. First, i'd obsess about her, (she was all i'd think about Breakfast, Lunch, and Dinner) and when I got over her, i'd obsess over literally anything except the different thought ideas would rotate throughout the whole day. I would tend to take a thought and just dwell on it (most of the time, ignoring what's in front of me). I can't seem to focus. Because of this distraction, i've become somewhat a failure at life and it has greatly forward my depression (my depression and stress really started when she broke up with me). I feel that this may be the reason why i've lost most of my hair on my scalp. Since, well, NOW, i'm doing something about this problem so that it may grow back again. All of it. I think there is a chance that I may grow all of it back since it was caused by my mental problems. So then if i'm cool and calm and not stressing, it should grow right back then right?? Well, I mean, my insecuritys (I feel) was the real cause to have sparked up EVERYTHING that has happened to me so far in my mental and physical appearance.

Lastly, I want to add that I did see a dermatologist about my hair, but I was very disappointed by my visit. I don't make enough money to see a much better dermatologist so I ended up seeing one at my local hospital by referral for free. All he said was "well, it's natural. DHT.". It was all he could say. I left from there without saying anything else because it just wasn't worth it. He wouldn't know. But I honestly doubt what he says because of the amount of hair i've lost at such a young age compared to my parents. And also, the hair that i'm losing in my eyebrows. No one, in my family, is losing their eyebrow hair. So please, whoever is reading this, read this carefully before concluding common causes.

What do you guys think?? I need help. Thoughts, ideas, anything knowledgable. Whatever happens, I just don't want to lose my eyebrow hair. I really can't accept that.