I'm just 23 years old. What is happening to my hair?! Pics included.

[davidfan]

I'm 23 years old, always had a full head of hair. Everyone in my family has too, nobody has gone bald. The last four years, I've been on a really bad diet: a pizza and pepsi everyday. Sometimes I skip meals, eating just once a day in order to make time for studying. Zero exercise. The last two months, I've been really really stressed and had also received a major shock two months ago. My question is: am I going bald or is this temporary diffusing due to all the above factors? I also have pasty dandruff and oily skin whenever I don't wash my hair for more than two days. Despite this, i washed only once a week the past two months to save time.
Pics: Hairline: http://imgur.com/a/e4Yhd Dry and tossed: http://imgur.com/a/fkc7y Wet: http://imgur.com/a/q6BRH Pulled: http://imgur.com/a/RnrfN Wet and with gel: http://imgur.com/a/GKLCY
Please help. I'm really worried.

 

[Westcoaster]

Your hair looks ok. You're most likely stressed and run down, try to improve your diet and take better care of yourself.