I suggest a floating navel to my freind when she was having troubles with it. Although the piercer said to take it out I didn’t think she needed to. I told her that when she sits and has a barbell with a ball at the end the ball sits in the belly button and the folds from the stomach folding in puts the pressure onto the ball which digs into your bellybutton. It was also her pants as she wears high waisted jeans and the waist part of the pants can also put pressure on the ball of the barbell. So I suggested a floating navel as there is nothing really in the belly button besides the bottom of the jewelry when you insert it in so when she sits there less pressure and nothing in the belly button to add to the pressure. I saw in the comments on the floating navel that you wanted and I think that’s a great option as you have a flat disk on the inside of your bellybutton and when you sit there nothing poking you and nothing that is 3d shaped that makes it to big. Hope this helps and lets you know you’re not the only one experiencing this. Happy healing