If it didn't hurt before when you coughed, but it has started to hurt, I would brolly go see a doctor. I have to say that I have no idea what it could be, but sounds like somenthing I would personally go and check out. And if it hurts hurts, then go definetly see a doctor, or if it lasts for long period of time. Do we have a doctor here?:? You can try googling it, but usually when I try that, I soon find that symptoms could fit to all sorts of horrible thingsX_X And then it appears to be nothing:whew: