Help please.

[TheGeniusism]

So basically, I've been feeling, like all depressed and alone, I have friends, but like I still feel like I'm the only person in the whole world, also I'm ALWAYS angry, like the other day, some guy bumped into me at school and I swung for his face, luckily I missed, otherwise that would've done some damage. Also this is my final year of school, and I have my exams in 10 days, but I can't seem to study for them, every time I sit down to study, I get bored and do something else, or I fall asleep 5 minutes after opening the book. Without studying I can pass with C/B grades, but I want A/A*. Also I get reaaaally bad headaches every 2 hours or so, even when I'm sleeping.

So yeah, I'm pretty fudged up at the moment.
Any help appreciated.