well it could be a couple of weeks to a month. Since she is a first timer she might not even lay again. I had a female lay two eggs in sept. and she did not lay again. So its just up to her. good luck with the eggs and I hope you get more!!!
The time between varies greatly and there may not be a next clutch. Just keep an eye on her belly and see if you can see them forming or not. But if she were to lay another clutch it would not be for a couple weeks...in which time you need to be ensuring she is eating a lot and getting more calcium.