After receiving a notice about a free trial based on the amount of stock photos i had sold - i activated the subscription and it promptly gave me a new account which has none of my old photos or albums.
By @Johnemac72
The system that you are describing is not a trial, but a one year free subscription of an Adobe product. If you are redeeming the same product as you have in your paid subscription, that paid subscription will be paused. That is all. There will be no changes of any kind to your data or installed products.
If you redeemed the subscription under a new account that new account will have a subscription too, which is pretty senselesss. You will need to sign out and sign into the old account which absolutely needs to be a different e-mail address (it does not work otherwise!).
As @Jill_C said, it is not possible to have two Adobe IDs under the same e-mail, except if your former subscription is a Teams or an Enterprise subscription, which is not a private subscription, but a subscription managed by a company. If you have such a subscription, you will need to sign out, and sign in again and select your company during the sign in process. It is not possible to use the private space and the company space at the same time on the same computer.
Adobe customer care may be able to locate all the accounts you have. Adobe customer care can be contacted by beginning a secure chat session at https://helpx.adobe.com/contact.html?rghtup=autoOpen. Pop-up blockers need to be disabled, you need to accept cookies! If the chat window fails to open, or is non-responsive, use a different device and/or browser to start the interaction.
For support via Twitter:
https://twitter.com/AdobeCare
(see also here: https://community.adobe.com/t5/creative-cloud-services/how-to-contact-adobe-support/td-p/11875703 or here
https://community.adobe.com/t5/account-payment-plan/how-to-contact-adobe-support/td-p/11843852)
Important: Adobe does NOT contact you unsolicited by e-mail or direct message. If you get contacted by direct message from a person, claiming to be an Adobe employee, look at that profile and check if they bear the “Adobe Employee” marking under their name. Adobe support does not use Skype to give you support.
If in doubt, ask the forum.