iPhone 5 headphone jack weird noise problem

Hi,

I have an iPhone 5 which I bought a couple of months back and my headphone jack was working until today. I plugged in an Aux cable which was for my external speakers and then a blue screen came up on my iPhone and my iPhone rebooted by itself. Now when I plug in any of my headphones into the headphone jack, I hear weird crackling and buzzing noises when trying songs on a low volume. However, it does seem to work fine on maximum volume and them if I lower it back down to low volume or medium volume, it works fine for a couple of seconds or minutes. Can someone please give me suggestions on what I should try now?

Thanks in advance.