Internet browsers and Internet security products do now advise users if an email address they're using has been recorded as being involved in a data breach. The software should tell you where the data breach is.
The website haveibeenpwned is often used as the source for the data breach information. You can enter your email address and see what data breaches have been associated with your email address.
The first thing is to scan your devices to remove viruses, trojans and malware that may be collecting passwords. Then when you have confidence that the device is clean you should change the password. Changing your email password
Based on what the haveibeenpwned website shows you (if the webpage turns red to indicate a breach) you may be able to identify other online logins where the password should be upgraded.
Just say if you need more guidance.
Hi sue136, it looks like Gondola has got you sorted on this.
Please let us know if you still need help.