Broody duck - now all not laying!

I have three Welsh Harlequin females, plus a drake. One of the girls went broody about 10 days ago. I am hoping to have them hatch out babies - but not in November! I let her sit for two days while I thought about if it was practical to let her try to hatch them, then decided it wasn't a good idea, so I took the three eggs she was sitting on. For two days after that she laid an egg each day and sat, and I took it. The other girls all stopped laying, but none of them went broody. Now - no eggs at all!

I got the ducks at 12 months old in July and they molted when I brought them home. 8 weeks later they started laying an egg a day. We got about 1 month of eggs - and now none! We're a more than a little frustrated since we've basically spent $20 per egg as of right now! Did I completely screw this up by letting her sit those two days? Or could it be something else? We had a big cold snap (like 20 degrees colder than the week before). Could that have been the cause of them stopping?

Since we've only had them laying for a month, I have them under lights to have them lay through the winter.

Do you think they will they start laying again?

Thanks!

Also, the duck who was originally broody, is not trying to sit anymore. She's out and about all day. The weather got much warmer this week too - back to the 40s-high 50s.