i am trying to switch out my piercing but the ball on the bar will not unscrew to get off. about one week ago i tried it and got it off. but didnt feel up to switching it at the moment and put it back on. now it will not come off..
It sounds like you reefed the ball back on, making sure it was secure. It is!
We would hold the shaft with a pair of forceps, and use smooth-jawed pliers to grab and turn the ball to get it started.
so i should go into a piercing place and get them to do this?
They will have the tools necessary to do it right.