iCloud email issue

I can't seem to log into my icloud email. I've never had this problem before. When trying to log in, it says "You're Apple ID or password was incorrect" I know I didn't forget my password (I write all my passwords down). So I click on "Forgot Password" then it makes me input my Apple ID. I reset the password, but all this is doing is changing my Apple ID password. My iCloud email is different from my Apple ID.