I agree with wildwood. Obviously you didn't have any eggs for her to incubate. She will be a bit out of condition now, but give her some Poultry Spice in with her food, some fresh greens (for iron) or let her free range on grass (you don't say whether they are free range or not).
None of my girls are laying at the moment - the weather's just putting them off. I've got two hens, who have been broody - one of whom now has 2, 12 week old chicks and came back in to lay when the little ones were about 4 weeks old, but has now stopped laying again. The other has got very young chicks. Expect yours to come back into lay in a week or two, depending on the weather. remember, though, at this time of year, a lot of hens go into moult and won't lay. Even mine who haven't been broody aren't laying - several are in moult and, like I said, the weather has affected the rest. Just be patient with your lass, she'll start again soon. Good luck. K