Have I really been hacked or am I falling for a phishing scam


I received an email on the 14th saying that a hacker has access to my pc it says that at the time of hacking my account (myemail@gmail.com) had this password (it was a version of my password but not one that I’ve ever used for my gmail) and it claimed to have been watching me for months and that it had infected my pc through a adult website and had video of me when I was on the site doing you know what and that it would send it to my contacts and correspondence but I don’t have any contacts on my pc and also I use a different user and email when I do that, also why didn’t it send it to that email and not any of the other emails I have saved on my pc. Am I falling for a bullshit email or do I have something to worry about? Also it said I have 48 hours to pay them in bitcoins and that it would track when I opened it and start the countdown and I just opened it last night