All my music has disapeared of my iphone 5c?

So basically, I have purchased a couple of songs of itunes over the past months. I also have whole albums which i put onto itunes then put onto my phone. But the other day, I went to my music app and i only had the music i've purchased through i tunes. All my other stuff vanished. I tried to put it back onto my phone via itunes on my pc bt it won't work?

Kill it

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