Nudes

please don’t judge. I was on an anonymous chat site and I was getting friendly with a girl for a few days , when she sent me a nude. Waist up. I’m straight but she started asking and asking and pressuring so I eventually gave in and sent one , waist up no face. Then the app notified that she took a screenshot and deleted the chat so I can’t find her anymore. I’m super paranoid now and it was a bad decision but I don’t know what I should do or if I should be panicked?