Hi,
Please open a InPrivate/InCognito window and sign in (same account you used for trial) to the Azure portal using link below:
https://portal.azure.com/#settings/directory
This should show a list of tenants you have access to, one of which should be your free trial. Click the Switch button next to your free trial subscription if it isn't already selected.
If the above was useful please click Accept Answer. Please reply back in a comment with your results.
Thanks.
-TP