Iphone 4 music randomly disappeared?

Iphone 4 music randomly disappeared?

I was on my iphone 4 and I was listening to some of my music and on pinterest and all of a sudden my music stopped and kept crashing when I would open the music back up? And I shut my phone off and turned it back on and now All the music I purchased on my phone disappeared. So I went onto my computer into itunes so I could just bring all the music back on my iphone but it says its on my phone still? But none of the purchased music is showing up in my music library or playlists.

  • Why are my earbuds randomly speeding up my music? I have an iPhone 6 and some Sony earbuds. When I use the Sony earbuds they sometimes randomly activate siri or pause my music. Recently they've been speeding my music up randomly. To make sure it wasn't faulty software I changed to my apple earbuds. The music went back to normal.
  • Volume bar on my iPhone 4 has disappeared? My volume bar has disappeared on my iPhone 4 when I play music through the speakers. I can't hear the typing of my keyboard either, but when I go into voice memos I can listen to them. After that I go into my music library and play music and the volume bar is there for about 5 second and disappears again. I have tried rebooting it and it's done nothing. The sound will just come and go. What the hell is wrong with my iPhone? Please and thank you. P.s it isn't jail broken either.
  • Albums in my music disappeared? I synced my iPhone to my iTunes library so I could put more songs on my phone and when I checked my music none of the albums I have except the new music I just put on it have artwork, how can I get my covers back without restoring my phone?
  • My music randomly deleted off my iPhone? So I downloaded a new song and went to my library to see if it downloaded and all my music was deleted. Is there something I can do or do I have to download them all manually? (I tried restarting my phone)