It sounds like you accidentally ended up in an empty duplicate account. This can happen if you accidentally use a different login method than the one you used when first creating your account. Please log out and try logging back in using the correct login method (email, Facebook or Google login).
If you can't remember your login method, please contact our support with the following information:
Your username
Email address associated with your account
Description of your user picture
Some of the pictures you last published
An estimation of how many Likes your account had received
With this information we will be able to find your account and check your login method for you so you can get back into your account.