Security issue – Instagram Review

I received an email showing that instagram got a request to reset my instagram password, but the fact is I have never requested. I tried to see how people can request to reset the password, and I found that if you want to reset the password unless you have to logged in to the account, is that mean my account already being hacked? Is someone sign in my account in other place? I already set the two-factor authentication, But the problem is there is no login code sent to my phone and no new device show on the login activity?
Review by milky910 on Instagram.