So I don't know if anyone else has had this specific problem, but after some digging within my own account, I found a really interesting bit of information-
Although my email and contact email are both set to my current address (the one it has been for upwards of 4 years), when I tried changing some microsoft account information, it sent a security code to my parents email, which I had initially used to sign up some time 5 years ago.
So, if that is the case and it is still linked to that account in some way, there's a very good chance that the email was sent to that account and then promptly deleted, being that I don't even live with them anymore.
Kind of frustrating that I had to bother them to check their trash folder when they get home. I'll post again once I figure out if it's there or not.