for the past month I have been going through the same routine. I usually have a good day, other days are a little bad, but overall nothing too terrible. but later at night, usually around 11pm, I start getting sad. and it just gets worse as the night progresses. every night for the past month, I haven't gone to bed any earlier than 4:30am. It's like I can't sleep unless it's that late. it's strange, because not only am I tired, but I get depressed, angry, or both. and even though I'm tired, I can't sleep, even if I try. I don't understand what is happening. I'm 19, and nothing like this has happened before. quite obviously, not only am I tired but I'm bored, being that it is 4 in the morning most nights that I feel this way. any insight in this matter would be greatly appreciated.