This guy from the Internet got my number

I did something pretty stupid about 2days ago, and my conscious is killing me and I cant take it anymore and I need advice. My friend got on this web site that people did like shows and stuff, and I have a camera in my computer so we got on and stuff, And a bunch a guys of course wanted her and me to like flash the camera and stuff, and at first I wasnt going to do all that, but then My friend did it, and like 7 minutes later, I was like mm okay I guess. So I did. My friend got a call for one our friends and my friend has a pre-paid phone, So she was giving our friend on the phone my number. And then everyone on the show thing that was watching us, some how heard it. The next day I got a call from someone, the first time it was restricted, and they were talking about the incident last night, and how he would call my parents, and how he was a investigator and stuff. And I got scared cause I never do anything like that, and I dont want to get in trouble. And I didnt know if this was a joke or not, and it sounded convincing to me. Then he called me back a fews hours later saying that there is another option, that I could take a picture of me naked, one from the front and then one from the back or me bending over. And I didnt have to show my face. But I didnt want to do that, and he kept saying he would call my mom and stuff and so I said okay. And he gave me an email to send them to. But I sent him two fake ones with the faces blacked out. So he called back and was like I dont know if thats you and stuff. So he said to write his name on a piece of paper to let him know its me. And like my cooch had to be spread. And I was sooo scared and I really didnt want to do that, but he just kept going on about telling my parents. And I really didnt want to get in trouble, and I know that it was wrong. I had no other choice but to do it. It doesnt show my face and its not close up. But I cant take this anymore. D: I dont know what to do. I was thinking about telling everything to my mom today and have her call the police and stuff, but im so scared. Like I want to soo bad, but then again I dont. Should I? I need help. Please. =[