I think someone logged into my Apple ID but I can’t see the email used

i think someone logged into my Apple id but I can’t see the email used. Kinda seems backwards. Think it’s an ex just want to know if I can find that out for sure. The letter places match in number and her first initial is a. But so is mine.

Is that why it says (a•••••@icloud.com) but says my actual email at the top

[Re-Titled by Moderator]