back One of the 45 stories

I am 16 years old. I have a private story on Snapchat with only the girls I trusted. I posted videos of me making funny faces with friends or when I was drunk other girls would post that I was sleeping. Only,  my bra would be visible at times. One of the girls who had access to the private story was friends with a girl I was fighting with. She screenshotted everthing and would send it to others. I asked nicely if she could delete everything, but she didn’t. I went to my teacher afterwards and told them everything that had happened and they said they would do something about it. It’s been three months and the pictures are still being spread. I have no idea what to do and nobody can help me.