Also question is, can my nose piercing close up overnight?
Yes, if the piercing is still fresh, a few weeks or a few months old, it would close overnight. However, if yours is an older piercing, say over a year old, then the chances of the nose piercing closing are slim because the piercing is healed and the fistula matured.
Also to know is, how long does it take for a week old nose piercing to close?
It can take a day or two or even some years also to close up the earring’s holes completely. The new piercings usually get closed within 24 hours or more but the older one usually takes some time to heal up.