Don't panic! If you forgot your password you can request a new password here. Once you make the request, we will send you an email with which you can reset it.
The recovery email is sent automatically, so if you delay in receiving it, make sure you are checking the same email with which you register your profile and check the Spam and Promotions folder.
Remember that, if you registered through Facebook, your profile was not associated with any password so you do not need to indicate it to log in. If this is your case, to access your profile you only have to click on the Login with Facebook button.