Hi there, @amelie_babkie ...
It might be too late for this, but it's worth you spending a few minutes to check for sure. You may be able to recover your quiz in your school's "Test" or "Beta" environment of Canvas. To access either of these environments, sign out of your regular environment (called "Production"), and then sign to "Test" or "Beta" using one of these Guides:
Next, when you are in one of those environments, navigate to your course to see if the quiz exists in that course. If so, then use the following Guide to export the quiz: How do I export quiz content from a course? After you have downloaded the quiz export, sign out of the environment that you are in, and then log back in to your "Production" environment. Navigate to your course, and then import the quiz using this Guide: How do I import a Canvas course export package?.
I hope that this information will be of help to you, Amelie. Please let Community members know if you have any questions about this. Thanks. Stay safe, and be well.
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