Blocked my account

Hello,
i tried to logg in my account but it says i have to recover my account because it seemed like somebody else accessed my account. and yes, i did from another computer. but thats not my problem. it says i only got one email as a backup in case my email got lost. but that one is my moms...from 10 years ago. i can do it the other way but i just dont have enought information about by account as its been so long since i last logged on. HELP