Ipod on my iphone 4 won't work?

So earlier today i connected my phone to my computer to back everything up. After it was done it had deleted all my pictures except the ones that i had last backed up (if that makes sense). ANYWAY, i'm trying to play music on my ipod on it and it just keeps skipping through the songs and not playing any of them. It will stay on one song for a second or two and then jump to the next song and it does the same thing over and over.

what is going on and how can i fix it so i can listen to music

Try restarting it, and if that doesn't work; try installing your most recent backup onto it.