as for you mood......
your probly at an age (17-21) when if you have a personality/mood disorder....it will come out......its got to do with "growing up"......
i went through that craze this summer.......
i just started "realizing" everything about everything and it made me very unhappy and anxious and all i could do was cry and freaK out at people.....i started getting the worst case of the HIVES from stress (everyday)....thats when i went to patient first......who referred me to a psychiatrist....
now im better but i still have excess anxiety and get hives but atleast i have xanax to chill me out when i need it........go to a doc...
i think depression mostly has to do with HOW you percieve events/conditions...i know its hard to control it......but its really important to surround yourself with the most POSITIVITY possible...