When we can't identify the specific reason for feeling depressed, it's because of some kind of chain of events which makes end up lost in our thoughts.
That happened to me too.
Now, I know why I'm depressed and suicidal and that's because I just can't imagine dealing with a normal life for 50 pets as I just get older and sick!! Nonsense!!
Also, I hate not understanding this world. Why is there something rather than nothing? What's the true meaning of life? I hate it lol.
I never asked to be in this world and the system forces me to live here! How could I not be depressed?
Anyway, my bipolar disorder still allows me to have great days when I'm in the UPS zone but the DOWNS...omg, I hope nobody experiences that hell, it really sucks!
Hugs,
Matt