I associated my non-normal account with my normal one then forgot the details for the non-normal one. Is there a way of recovering my details using my normal one? (I’ll explain)

If I have used my normal email address as my associated email on another account, can I find out my other account's address using my normal account if I forget it? I have two because I write a blog under a pseudonym and they ask for an email address. But I've forgotten the address for my blog email account and I was wondering, because I put my everyday email account as my 'alternative account' on my blog one, could I use my everyday one to find out the details I've forgotten?
PS I know.. I'm an idiot..