Is it something more than moodswings?

okay i'm 13 and I've been having strange mood episodes lately. Sometimes i can be so happy it's weird and other times i can be so mad i throw things. When i'm feeling depressed i feel as though i wanna hurt myself and i feel worthless. My sleeping has also been weird i don't really ever feel tired even when i don't get enough sleep and i sleep to much a lot. Another thing is it's really hard for me to pay attention, i'm easily distracted and when i do talk about things i seldom go through a lot. things fast.