Yup, my oldest, not even 11 yrs old is in the midst of puberty and it sucks! He gets moody, irritable, and tends to go into a complete meltdown when he is stressing or tired. I think all kids should be put in some sort of suspended animation until there body matures past this stage. Then, my sanity might stay intact (bwahahahaha).
If its this bad with a boy, I have much pity for those of you who will have to go through it with a girl.