My iPhone 4 volume is messed up?

I just got my iPhone today so I don't know what it's upgraded to but I just know that it's got iOS5 on it. The volume is all messed up can anyone help me? When I take my headphones out the volume adjusting bar is gone and the music doesn't play. And sometimes when I'm listening with my headphones the music will still be playing but I can't hear it in my headphones and the volume bar will be gone again. I don't understand what's wrong, help please?

-try turning it on and off. It may not help at all and you've probably done it already, but I had the same issue with my iPod touch and worked when I did it.
-put it in a docking station or something. Does the volume still work then when you take it out? Yet again this helped when my iPod did it a second time but i don't know.

  • Will my iPhone battery get messed up? I'm on a trip and I left my phone charging in the house by accident (I'm going to try to get a friend to take it off) but I was wondering how long can it stay charging until the battery goes bad? I've heard stories so I'm just wondering if they were true.
  • Why is my iPhone screen messed up Whenever I touch my iPhone screen it goes like haywire and does random crap it almost bought me a computer I don't need please help!
  • Why is my iPhone 4s messed up? Its stuck in horizontal mode where it only shows the albums and won't go back to vertical and no it's not on screen lock I checked
  • My stupid iphone/apple/itunes messed up my phone, and now all my music is gone this is what keeps showing up. I'm supposed to have almost 400 songs and it'll only let me put 158 on my phone.wtf! Any snarky remarks and commentary are unwanted, and Yeah I'm annoyed since I paid 1000 dollars on my phone and i'm expecting the product to work properly.