I am a 14 year old girl. I sometimes feel all happy and jumpy/excited but then out of nowhere I feel depressed. But then, I feel alot of rage and so angry. I start throwing things and yelling. This happens mostly alot and when I feel angry I start hitting things and hurting myself and I start having rapid thoughts going through my head. But then after that, I feel all happy and normal like if that never happened and I start thinking why I did that. I reall don't know what been going on, this been going on for about 4months or more. I haven't told my parents or no one. If I do have a disorder or what ever, what's it called and how could I tell my doctor and parents? Oh and my half sister suffers from bipolar ( I don't know if that really good info but I just wanted to let you know). Thanks.