password


I was just going through my spam folder which I don’t often do, and have an email that was like a black mail. It was written by someone I don’t know, but they knew a password that I use a lot. They wanted be to pay nearly $5000 to them and they were implying they had evidence that I had been on a porn site.
I don’t go on porn sites, so that part isn’t true, but the fact that they knew a password and my email scared me.
I have just changed the password on all the sites I use that password on.
But I still feel shaken.
What can I do to feel better?
thank you!