Hormones start to act up, especially for girls, around your age, and they can make you react strongly to little things that normally wouldn't even bother you. But if you've felt this way for several weeks, you don't have to put up with it, and it might be a good idea to go to a doctor and ask them what they think.
I think most people will suggest you see a doctor or talk to your school counsellor (if there is one at your school).
do you want to talk more about the things that have gotten you down lately? what's let you down? what have you lost?
you should really see a counselor, or psychologist.
could you go to your doctor?
sounds like it. maybe depression &/or anxiety. have you talked to anyone about it?
have you talked to anyone about it?