http://www.nimh.nih.gov/health/topics/anxiety-disorders/index.shtml (brief summary, get to know)

http://www.health.com/health/gallery/0,,20646990,00.html 12 signs you may have an anxiety disorder. It's clear that this is sth subtle, that many people who suffer from it often don't even realize. It can be dismissed as stress or a bad physique while it lies much deeper. Of course, when reading these things one must be careful not to jump to conclusions and diagnose themselves, if it really is just (temporary) stress or a mild form of the disease at least.

http://www.prevention.com/mind-body/what-its-have-anxiety recent article