Can I get it back? And how?

Usually you'd go to the forgotten password page. If you tried all e-mail addresses and still can't log in, please contact the Stack Exchange team directly.

Can I possible by any chance ask for this user (me) registered email address?

For privacy reasons we cannot hand out this information, sorry.

Can I get it back? And how?

Usually you'd go to the forgotten password page. If you tried all e-mail addresses and still can't log in, please contact the Stack Exchange team directly.

Can I possible by any chance ask for this user (me) registered email address?

For privacy reasons we cannot hand out this information, sorry.