Some hens are laying again in a couple of weeks, others in a month or so. And it depends upon how long they kept their chicks. She may set on the floor for a few days, but then will resume activity.
Mother nature sets each hen with a cycle, lay, set, rest, lay set, rest.
And neither you or the hen can change the hormones or her temperature, although changing her housing temporarily can help things along. I have never experienced this dilema. Of the pile of eggs, only the one hatched. None of the others were any good. Which is why there's only the one chick.