I'm being blackmailed and they shared the photos

A couple of days ago someone contacted me on Instagram. We started talking and I asked some questions and the answers at that point sounded genuine, although now it's obvious manipulation.

We sent selfies to each other and a couple days later they suggested exchanging nudes. In my stupidity I agreed and we exchanged some pictures and videos. Then they sent screenshots of my account etc. and threatened to share them.

I replied that i dont have money soon after that I googled around and followed the instructions

I made my account private and blocked the account after screenshotting the chat. I also just sent a message to my sister, who hopefully can help.

I hoped that the posts were telling the truth about the scammers not actually sending anything. But now they added me and some of my friends and family to a groupchat and sent the pictures. I didn't have time to screenshot the group but I hope that the accounts were fake, but it's highly unlikely.

What should I do. The police dept. doesn't accept report between 06:00-22:00 so I can't do that at the moment.

I'm so fucked.