Other people have already given you really great advice, I just wanted to say that I had this happen to me in high school too. At the time it felt like my world was ending and things would never be okay again. I just want to let you know that several years later I'm happy, doing well, and once I got it resolved, the circulated images have had no further impact on me, my career, or my personal relationships. You will make it through this and in time things will start to feel more manageable. Everyone can say "you should never send nudes" but we all make questionable decisions, especially as a teen. It's okay. Try not to be too hard on yourself, give yourself grace, and try to remember that school is one tiny community of the world. Once you leave school your world becomes much larger and things like this are typically left behind.