Hi Michael,
It sounds like you have multiple ArcGIS accounts: one that you were previously using to license ArcGIS Pro, and also a public one. Please sign out of the public account in Pro and sign back in with your other account.
If you're not sure what your other account is, go to https://www.arcgis.com/, click Sign In, and click Forgot Username? You'll receive an email with all of your different account usernames. If you have multiple email addresses you may need to try a few different times.
If you continue to have problems, see I am having problems signing into or licensing ArcGIS Pro.
