There no need be shy or embarrassed for search this related scam information. Yes, I get it you watched porn on your smart phone. Be it on Pornhub.com or xHamster.com. There nothing wrong about it.
What’s your concern now is that you received a weird email that trying to extort or threaten you to pay up a sum of money in Bitcoin. This is generally known as the “sextortion scam” ir “webcam blackmail”. The email claims that they have used your devices webcam do take a video of you watching porn. They demand you to pay up on certain date.
Yes, you are panicking and worry. But the simple thing you can do just report it, delete the email and forget about it. You are safe and you won’t loss a single cent.
I go further, do some research this scam has made over millions of dollars. There are people who easily fall for such scam. I assume if you make your first payment, then you will be their forever money tree.
Stay safe against SCAMS!