is it normal...

is it normal for me to feel happy one minute then depressed the other... today i was in class and my teacher got mad at me for leaving the class to much... i was fine and happy when i was in class but after that i was pissed of at the whole world... isnt that a little strange?

Sounds pretty normal to me. It's easy for the little things to make us fly off the handle. If you felt attacked by the teacher, it makes sense that you got upset about it. Try and let it go and remember that you can't go back and change it. Why let it affect the whole rest of your day? I'm a firm believe that we can "restart" the day at any time by changing our attitude and saying forget that, I'm gonna have a good day because I want to be happy. Try not to worry that you're strange because you're happy one minute and depressed the next. Life is a roller coaster, we can chose to let go of the bar, throw our arms in the air and enjoy it, or let it make us sick.

Yup normal. no one likes to get yelled at by teachers and when that happens it sometimes sets the stage for the rest of the day.