Vibrate Help

My phone appears to be in vibrate mode with the red showing however, it switches constantly from vibrate and normal mode while staying stationary. It is not physically moving up and changing to normal in my pocket or anything. It ocassionally freaks out and goes from vibrate to normal quickly. I think I might have busted it since it does not have the option of just vibrating even though it appears in vibrate position. Not sure if anyone can help, but suggestions would be great!

Thanks