Sounds like you sprained your hip-gyrating muscles, bad boy~<3

Hmm.
I'll be back to shakin' ma thaaaang soon enough, tho. ^_^

I sure hope so <3

My poor kitty..*nuzzles*

*hugz*

Sounds like you tweaked your Latissimus dorsi. Let it rest a while, but you're going to want to stretch along the dorsal alignment to keep them from being far more painful than they need to be over the next few days.

Tomorrow morning (you'll need help for this) find a table that is about waist height. No higher than your tailbone - lower works, higher does not.

Lay backwards over the table - your feet should be planted firmly on the ground and your back straight on the table. Your tailbone should be just off the edge - you may have to bend your knees. Have a partner take either of your hands and SLOWLY pull you up, curving your spine naturally as you do so - do not attempt to do a sit-up, just relax and let them pull you up. Your back muscles and possibly the ones along your ribs might twitch a bit and spasm, but resist the urge to flex.

This will properly realign any muscles along your back. You can also check out a chiropractor in case you have a disk that's causing the muscle problems. :)

Hmmm, we shall see

I... don't think it was a disk thing. It happened spontaneously, and not after any agressive action or antyhing

Yup! well try what i suggested - it'll fix any muscular issues. :)