It is my first ring. I have had it in for 7 months. I wanted to change it so I tried to unscrew it but it wouldn't go. I even had my friends that had their belly button pierced try to unscrew it but they couldn't get it either. The top screw won't move and it hurts my fingers when I try to unscrew it. Should I go back to where I got it pierced? Is there a way I can get it out at home? It seems like the top ball is jammed because it just won't move when I try to unscrew it. HELP?! PLEASE!??

If you absolutely cannot budge the screw going back to where you had it pierced may be a wise thing to do.
They should have small specialized tools to handle these sorts of things.
I never had this problem with my belly ring, but I can imagine if you try to hard that you may injure yourself.