Have you created more users? Vipps and email are two different logins. If you have logged in with Vipps when you purchased your booking, this is what you need to log in with. Similarly for email, you must log in using the same medium that you logged in with when you made the booking.
Go to:
https://minside.periode.no/
Select log out via the menu in the right corner.Then log in again, select Vipps (or email if you were already logged in with Vipps) and see if your booking appears here:
https://minside.periode.no/bookings