Way too soon someone else will be teaching them all day and you won't be their number one anymore. They need you the most right now to teach them and love them while you can.
It seems like there's a void and like kids can never get enough of their parent's love and time and attention! Twenty-four hours a day with your constant presence and they're still clamoring for more! It's draining!
But they love you and there is a sparkle in their eye and a sweet confidence that develops when they know they're loved as they go off into the world.
Unless you have to, I say use your license when they're gone. I always wanted to try the preschool at home thing. Congratulations on getting your license!!! You'll use it when the time is right for you and your family.