I have several monitoring ‘alerts’ for my user name. I get these all the time! It’s only the email user name but not the p/w. Still, they suggest changing p/w. If I did that, I would have changed it probably a hundred times.
Once you’ve been in a breach the same information tends to pop up again and again in lists (pastes). If there is a specific site listed that was breached, you can look at the breach date and change if it it’s newer than the last time you changed. https://haveibeenpwned.com/ has most breaches with details. If you use a different strong password on every site and two-factor authentication where available, you are probably safe from the information in pastes since it tends to be pretty old (at least for me).