How many days from now should I start seeing eggs? Unfortunately the weather is going to be horrible for the next week and may hinder a successful breeding of the new queen. If she dies will I have to buy a new queen?
Relax and leave the bees alone for about 2 weeks, then check for eggs. If you don't have eggs a month from now, then you will need to get a frame with some eggs and add it to your hive.
To answer your question exactly, since you had virgin queens hatching yesterday, then yesterday was day 16 from the egg. The earliest you should expect eggs from the new queen would be about a month from the time the virgin queen was laid as an egg. So you have 14 days to go. But sometimes it takes longer for a new queen to get her act together, so don't be too impatient. If you fail to get a laying queen in a month, ask your mentor for a frame of eggs, so your colony can start over in raising a queen. My bet is that you have a virgin queen already (before your inspection yesterday) so you will get eggs within the next 2 weeks.