IPod Touch Problems!!!!!!!! Please Help!?

Okay, today i downloaded the new version of iTunes, iTunes 10.3. After downloading it and syncing my ipod, i went on my ipod, and i was trying to go into my pictures, but for some reason, it kept saying updating library. this never happened before, and i waited for some time, but still, it didn't go away. so i unplugged my ipod from the computer, and turned it off. but its not turning off. theres the little circle thing that you get when you slided the red thing to turn it off, but its been there for like, 15 mins now, and it won't go away. i really dont know what to do, and i tried plugging it to the computer, but it says theres an error. im so freaked out, please help!!! thanks!(: