Try not worry
One day, my ipod froze and i went to restart it but it wouldnt restart. panicked i put my ipod on the charger, nothing happened. I then plugged it up to itunes and my ipod didnt even pop up. I thought my ipod was over. then i read some forums and it by HOLDING HOME AND POWER FOR TEN SECONDS AND THEN HOLDING HOME )WITHOUT TAKING UR FINGER OFF) FOR ONE MINUTE, MY IPOD POPPED UP ON ITUNES. itunes said it was in recovery mode but it was not because it didnt show a connect to itunes logo,its in dfu mode (im pretty sure, i just know its not recovery mode) it was just dead. I restored because i was scared and didnt know what to do, the restoring process didnt work, thank god (error 4800) i think. Then after about 10 ten minutes of a 1 hour and a half of waiting for my ipod to restore(my gma has a slow computer) my ipod came back on, with the logo of dead battery. so the moral of the story is wait a couple hours to see if it comes back on. After that day ipod freezes up sometimes and doesnt come back on for about 2 hours each time. when it does come back on with a dead battery logo. idk why it does this but it does. hope it helped. oh and its a jailbroken ipod