I'm only 16 years old and I've been feeling really weird lately and the only explanation I can think of is depression. I've been constantly in a bad mood, feeling low and like there is no help for me and in the past, I've always been quite optimistic about everything but all that optimism has gone recently. I've been bursting into tears at regular points during the day, even in front of people which isn't me at all. I've also been feeling very intolerant of people, I've been excluded from school for a few days because of this, arguing with teachers and I've also been feeling very worried about my future and whether I'm actually going to get through school or get kicked out and end up having no purpose in life. I used to be very sociable with people, go out and meet new people and stuff but that's all changed, I'd rather stay in bed than go anywhere. I'm just wondering what I should do from here? Should I see a doctor or will this just all pass by?