I can get my belly ring to unscrew

Sierra

I want to change my belly ring but it won't unscrew. It was the one the I was pierced with and will be my first time changing t. I can't get it to budge. I have co-workers help me and we tried pliers, lubbing it with cleaner, everything!! And I got it pierced at a shop in another state so I dont know if I can go into a shop and get it removed. Please help I want to change it