Greetings, @KarenADavies ...
I think you are going to need to reach out to your school's Canvas administrator or someone from their Online Learning / eLearning / Distance Education department. Canvas Community members are not able to access your school's Canvas environment or any course you may be taking at your school. Canvas administrators have the ability to merge two accounts together...as detailed in this Canvas admin Guide:
How do I merge users in an account?
You might want to provide the person you talk with a link to this Guide for their reference.
I hope this will help and that you'll get things sorted out soon. Good luck! Take care...be well.