Don't worry, your data is safe! You probably just accidentally created a
second account by logging in with a different email or social account.
This may happen, for example, if you first login with an email/password
using your Gmail email address and then use "Sign in with Google". Please
logout and log back in with the correct account.
How can I delete my account?
In the mobile app, open "Settings" and tap "Delete account". Please note,
all you information on the account will be permanently deleted.