i am bipolar and i struggle with depression. it's worse at night for me because i usually can't sleep for hours. some people sleep all the time when they get depressed, some sleep less. i feel depressed because i have a disorder. there is nothing wrong, i have nothing to be depressed over.
it helps if i remember to take my meds at the right time, and if i eat and exercise regularly. however when you're not sleeping well it becomes harder to do those things, and the depression gets worse. not being able to sleep plus having a depressive disorder plus dealing with withdrawl symptoms from not smoking plus general loneliness that comes at night equals a not very happy angela.