Just a Baby stores the login information you used when you initially signed up in the app. If you first signed up using Facebook then, you will need to login using the same Facebook credential you used. This applies with Google and mobile login too. 

The App doesn't link your Facebook and Google accounts even if they share the same email address. 

If you think you've lost your account, please provide your (1) email address or mobile number used to sign up with the app, (2) name used in the app, (3) birthday to verify the account.

We will get back to you shortly.