I can't hear my songs

When I turn on the Ipod, the volume is on but I can't hear the songs. I know there is nothing wrong with my headphones, because I have the 'clicker' sound set, and I can hear that when I scroll around. When I select a song to play, the time isn't even going, and 10 seconds later it just automatically goes to the next song, (which also doesn't play) and then when I pressed next, the ipod starting working on its own and going to next song after the next, and so on so on, until it went through every song in the list. What is going on here? Please?