I doubt you are severely depressed, you probably have moderate depression at the most, especially in this early stage, though it still feels horrible and is hard to deal with. You need to find somebody that you get help from, like a teacher, parent, family friend or doctor and take simple steps to regulate blood sugar like avoiding sugary drinks as much as possible, especially at night time, and getting at least 8 hours sleep if you can. PM me if you have any more questions x. I know what you're going though.