My sound is all screwy for my Ipod, help?

So, basically, my ipod was working fine, right? The left headset doesn't work for some odd reason, but for the most part, everything is cool. Today I tried listening to it and my ipod freaks the hell out on me. Even when plugged into headphones, the speaker is still on, which makes the sound on the headphones ten times louder than it should be. So both headphones and speaker are on at the same time, really loud even when it's barely turned up. I tried taking out the headphones while the ipod was playing, but it kept playing like nothing happened. I plugged them back in, the sound is super loud on the headphones again. I don't know much about technology. I turned the stupid thing off twice, let it reset, and I even made sure to plug it into the computer to see if it asked for an update or something. Some sort of bug. I don't know who to go to really about it, as I'm positive my warranty is up, yet I don't know how to do it on my own. Does anyone have a solution, or do I really have to take it in to the Geek Squad or something?