Is my belly button piercing migrating/rejecting?

Iman

I got it pierced in January so I’ve had it for 5 months. I’ve noticed that it’s a little looser than it was in the beginning, and I can see more of the bar. I’m worried that it *might* be migrating/rejecting, though I’ve experienced no extreme itchiness, swelling, or abnormal discharge so far. 😕