It happens, especially if your nursery gave you a work address you rarely open. Two quick routes back in.
Once you know the email, use Forgot password if you need a new one.
Which of these are you?
Your manager can see the email on your account in their manager tools and tell you what it is. If it is wrong, they can change it to one you use, and your progress and certificates stay with you.
Ask them to open Manage my team, find your name, and check the email shown there.
Get in touch and we will find your account from your nursery name. We can confirm the email or change it for you.