Music on iPhone 4S not working?

It started a couple weeks ago when all my album art was turned into a music note, which wasn't a big deal so i ignored it. But now when i press play, it shows that music is playing but no sound comes out and the volume slider disappears (the buttons don't work either). I hadn't downloaded anything before the changes occurred. Does anybody know how i can fix it? I have an iPhone 4S with the lates version of ios

IPhone I can't hear anything?

I had my earplugs in and I heard perfectly and I take them off because it's raining outside and I went outside with my phone and now I have full volume on and I can't hear a thing. I already checked that it has full volume and I can only hear with my headphones in. If there's water in in some place what do I do? I can't hear a thing

Instagram account server not found & then account disabled

Just posted a picture on Instagram, then pressed home button on iPhone and opened up Instagram again about a minute later. It took me to the login page, (which it usually doesn't do) and then when I tried to login, it told me "internet connection/server not found". I tried to login again, and it told me my account had been disabled. Please help!

Added (1). Yes, there's a good possibility that I got hacked since I was using the my college's Wi-Fi at the time.

And yeah I'm really mad! I'll definitely send them an email but I have a feeling they won't be able to recover my photos anyway. It sucks.

Can you time travel in tap campus life?

I have this game on my iPhone called "campus life" is it possible to timetravel? By that I mean if you change the day on your phone will it changed the day on the game? Same as changing the time, will it affect the game? I really want to speed things up so I can get further in the game, more cash, more diamonds etc.
Can you timetravel?

Is there a limit to the number of cd's i can move from itunes to ipod/iphone?

I'm burning a bunch of my old cd's to my itunes and then moving them to the ipod on my iphone (5, if that matters) and after several cd's moved to my itunes it wouldnt let me move anymore. The music just turned grey with a weird circle in the far left column. Is this the 7 limit that apple applies? If so how long do i have to wait until it resets?