I received a threatening message from my own e-mail address! What does it mean? Have I been hacked???

Hello pervert, I've sent this message from your Microsoft account. I want to inform you about a very bad situation for you. However, you can benefit from it, if you will act wisеly.Have you heard of Pegasus? This is a spyware program that installs on computers and smartphones and allows hackers to monitor the activity of device owners. It provides access to your webcam, messengers, emails, call records, etc. It works well on Android, iOS, macOS and Windows. I guess, you already figured out where I’m getting at.*****