Hi,
I'm not a guy, I'm a mom so I can't give you hands on experience (ok bad joke) but I can tell you that the chances are really really good that it is probably nothing. Talk to you dad and see if you can be checked out by a doctor. Be careful about the internet, it can create such a fear that can scare the bigeezus out of you. It's good that you are being pro-active about your health and not ignoring something. Remember, most likely it is nothing.
Big hugs to you,
Rosie's mom