Do bellybuttons pop out slow or fast?

Regs

I've always been under the impression that you just wake up one day and your bellybutton has gone outwards, but I'm experiencing a slow transition at the moment where it's going flatter and flatter and the top part of my bellybutton has finally poked outward but the rest is still in.

Is this the extent of my outwards bellybutton or will it continue to pop?