weirdest mood ever!

in the past few days i've been in such a weird mood.. dont know what's wrong with me..
allow me to elaborate;
it all started on wednesday night, while i was listenin to my iPod on shuffle and all of a sudden the song "Since u been gone" from Kelly Clarkson came up.. then it happened.. i started singing along (or let's say screaching along) to the song and got up and started dancing around the room (Gehad with me at some points) and jumping up and down on the bed and i have no idea what the hell happened to me.. lol.. i just felt like letting it all out; all the feelings that i've kept inside for a while.. all this hate or guilt or anger or i dont know what the hell it was that was inside me.. it just felt like this hyper-phase of a few hours was needed and screaming to this (particular) song really helped..
the next day the mood is still inside me in the morining, which might've showed a little (but i couldnt exactly let it all out in school, cuz we all know that would've been embarassing.. :S) then out of nowhere the mood totally turn 180 degrees and i feel like.. ooook.. no idea why i was so hyper and happy a few hours ago and like i started feeling upset about the whole thing.. it's totally wierd.. like a feeling of sadness and guilt came over me for being in that mood.. i dont know why that happened, and i hate that feeling!
whatever.. dont know why i'm posting this.. it's just something that i've been thinking about since yesterday.. like why i had these two phases (happy then totally down)? i dont know.. i guess i'm just a weird person.. hehe