I noticed a small black patch on my rear today and think it might be melanoma. Can anybody help me identify it?

Hi reddit, I noticed a small black spot on my back where I normally have a dull, moderate pain radiating from it. To be honest, I am completely horrified that I have melanoma and my mortal coil on this world will be cut short. Can anybody give me their medical opinions? Moral support welcome too. My dad already reassured me, but I feel like going into the fetal position.

Sorry for the bad quality shot, I had to take a picture by myself and rest the camera on something while using the timer function to haphazardly capture a scary black thing: http://i.imgur.com/vsujO.jpg