there are so many different kinds depending on symptoms that you cant tell without having a psychological evalutaion. i knew i was depressed but when i had my evaluation done they slapped me with about 5 different things. OCD, clinical depression, dysthymia (which is basically just depression lasting longer than 2 years), borderline personality disorder and something else. maybe PTSD? i dont remember, this was a few years ago.

good luck.