I do that sometimes, just don't get your grades slip because of it. I nearly failed last year because I was writing in every class. This year my grades are way higher, but I don't write as much in class, only during world geography, cause that class puts me to sleep. lol
You never really know.
It could also be Birth Control, if you're on it. I forgot my pill over three days in a row and it threw my hormones out of whack making me have terrible mood swings.
God, I do that a lot.
I don't think it's actual depression
but sometimes, I get this feeling where I honestly don't know what I'm doing living. Now, I'm not suicidal or anything, but I often find myself wondering why the hell I'm always feeling to sad, and then I usually shut myself away from everyone and miss days after days of school, then I'm alright for a little while, then something trigers it again.
My doctor said I was Bipolar, but I don't want the word to get out about that because to me, it seems like people put that on their mibba profile to get attention or because they think it's cool to have major mood swings and such.