MY MUSIC IS GONE

I recently just bought roughly $20 USD of music and now after around 3-5 days after the purchase, it’s all gone. My little brother is connected to my account and he told me he didn’t delete anything. So I went to the ITunes Store and went to purchased music and tried to re download my music and when I click the download icon, it says “downloading” then it just cancels the download. Can someone please help me out with this issue?