iOS 6-iPhone 3GS Update

So I updated my iPhone 3GS to iOS 6 last week. The next day i was on the bus, and decided to listen to some music. I got ou my earbuds, plugged them in to my iPhone 3GS, and opened the Music app. I started playing music, and I noticed that sound was only coming out of the right side of the earphones. The next day I used another different pair of earbuds, and only sound came outh on the right. I did this with two more pairs of earbuds, the Apple earbuds that came with my iPhone 3GS, and a pair of headphones. Only sound came out the right side. Any help would be appreciated