A girl I was sexting has shared nude photos of me with her friends. Do I have a case for revenge porn?

Ethically, I know I’m in the wrong, but legally, I think I have been the victim of revenge porn. I was ‘sexting’ a girl from work, sending nude pictures back and forth. I have a girlfriend. Therefore I was doing wrong. When the girl I was sexting realised I wasn’t going to finish with my girlfriend for her, she shared screen shots of our conversation (including pictures) to her friend and also my girlfriend, as a form of punishment. She tried blackmailing me first to prevent her from sharing the pictures. Do I have a case?