Reaction?

I got my bellybutton pierced 5 days ago It was doing great till the 3rd day. It became pink around the top hole and keeps getting more irritated and red. It's really sore to touch. The bottom hole is doing fine. I'm wondering if I'm having an reaction to the jewelery. The ball on the top is from a different ring. The guy at the shop couldn't find the ball to the ring I wanted so he swapped one from another. What do y'all think??