Old account

Is it possible to get back my old email account *** Email address is removed for privacy ***, I have alot of accounts from various websites linked to that email and they are all important for me to retrieve my passwords and accounts. Recently, I've lost my password for a very important site and I need it urgently. Please help me to reset my old account if possible. My current temporary account is *** Email address is removed for privacy ***. I've forgotten most of my information for the old account as it was an account created for me by my mum years ago. Kindly email me if you are able to help with anything possible. Thank you!