I'd just like to say that for those of you scared to visit the doctor for this, really shouldn't be. It would be better to "bite this in the bud" so to speak, by actually getting it looked at. What I mean is, if it is something serious, it is better to get a professionals opinion and get help. I'm sorry if I sound rude, but it really isn't the end of the world even if it is bad. And it is better to MAKE SURE that you're fine rather than trust an anonymous person's opinion on the matter.
(yes, I know I'm here too, what a hypocrite, right? but I still think that you should all go see a doctor, even if you does turn out to be nothing. Better to know fo sho!)