Login my account (facebook)

I have this account for so many years and I always used Facebook to login, and I just realized that it is not possible to login like this any more. The problem is that I don't even know what is the email associated to this account.

Account info:

ID: amilcar-navalhadas

Is it possible to merge the old account with the one associated to my email: pacleal@gmail.com

Thank you very much