Hello lencuff,
Thank you for reaching out to Apple Support Communities.
Changing your password should not change your Apple ID email address. Do you have multiple Apple ID accounts? If so, you may need to log into the old one in order to log out of that account.
More details can be found here:
"Reset your Apple ID password on your iPhone or other trusted Apple device
- Go to Settings.
- Tap your name > Password & Security > Change Password.
- Follow the onscreen instructions to reset your password.
You can also follow this process on a trusted iPad, iPod touch, or Apple Watch.
To reset your password on your trusted Mac, choose Apple menu > System Settings (or System Preferences) > Sign in with your Apple ID (or Apple ID). Then click Password & Security, Change Password, and follow the onscreen instructions."
More details: If you forgot your Apple ID password
If the issue persist, can you provide a few more details?
Cheers!