If you have reason to believe your information may be compromised, or you just want to be sure and double check, you can go here: https://haveibeenpwned.com/
Simply enter your email to see if you have a compromised account. Additionally, you can use the “notify me” feature to get alerts if an account becomes compromised. Lastly, you can also use the “domain search” feature to search for compromised accounts across an entire domain if needed.
The site also provides a useful list of all sites that have been compromised, so you can better protect yourself.