I've had the same Yahoo email address hooked up with my Facebook and Snapchat and every...

I've had the same Yahoo email address hooked up with my Facebook and Snapchat and every other account I've ever made for as long as I can remember. I went about * years without logging into my Yahoo account and couldn't remember my information. When I asked me for my security questions I couldn't figure out what they were because I was ** years old when I made my Yahoo account and I can't remember how I spelled what my answers for the security questions are. So I've been locked out of my Yahoo email account for about * or * years now, maybe more. I've since forgotten passwords to a few of my social media accounts and had to create new ones. It would be really really nice if I could somehow verify that I am who I say I am and log into my Yahoo account so I can log back into my Snapchat and other lost social media accounts. Please contact me back, Yahoo. I know all of my information to identify myself. Please help!