When you take your belly ring out too early, the piercing will close and shrink thus losing it. If your belly ring is tender and hurts when you touch, then it is not healed yet, presence of crusts in the corners and fluids indicates that it is healing.
Well it depends you should of taken it out if it was infected. If u just took it out cause u didn't want it then it will just heal up.. But if changed it out to early make sure the ring isnt too heavy. Or it will get irritated