Q: iPhone stuck in "headphones" mode

Earlier I accidentally grabbed my iPod headphones instead of my iPhone headphones and I think I may have jammed them in there too far. Because now I can't hear any of the keyboard clicks or sounds and when I receive a text message there's no sound either. And when I receive a call it won't allow me to hear the person on the other line unless I put my headphones in or use the speaker function. And when I turn the ringer volume up/down it says "headphones" in parentheses as if it's been set to "headphones" mode or something! Is it possible that I jammed them in so far that my iPhone thinks my headphones are still plugged in? Did I just totally ruin my iPhone? What do I do? Anyone know how I can fix this? Thanks!