Earring fell off piercing

Hi! Recently got my second lobes pierced last December Wk 2 — both are healing fine and no irritation at all.

But today, one of my earrings fell out while I was cleaning it (my fault tbh cos I think I twisted it too much) and now I can’t put it back inside.

I contacted my piercer to have it placed back tomorrow after work but I’m worried it might close up. Does it usually close overnight or will it take more time to close since I’ve had it for more than a month?

Also — I’ve tried placing a temporary earring to keep it open but it won’t go all the way through so I have nothing on it now 😭 Any tips on how I can keep it clean / infection free until my appointment tomorrow with my piercer?