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Upon checking I did not find any account associated with your email address firstname.lastname@example.org but I was able to trace a different account with same emails domain.
Please take a look the following form and see if this is yours: http://www.jotformeu.com/form/40621713687355
If this is your form, your account username is "bnj" and the profile email address of this account is "email@example.com". You can reset your account password by clicking on the "Forgot password" link which is in sign in page. Please check the screenshot below:
Hope this helps.
Do get back to us if you have any questions.