Call 911 NOW!!!!! U will die if something happens. To ur iPod!!!! Sorry. I was feeling sarcastic. Just leave it alone or hold down the power button till it asks if u want to power it. Down completely and slide and it should work:)
Well, when's the last time you messed with it? Sometimes they overheat and it takes a while for them to get back to normal. If so, just leave it sitting somewhere, I recommend on a hard surface, and wait it out.