Hello Joe Lee7
Welcome to the Microsoft Community.
I understand that you are having trouble on how to find all emails connected to your account, and I understand your confusion.
Based on your description, you can visit the following link to find the e-mail address connected to your account:
Additional security options
Manage how you sign in to Microsoft
You can log in to your account and check the email address you are connected to.
Please try the above and let me know the results so that I can assist you further.
Lee-MSFT | Microsoft Community Support Specialist