My name is Cassandra and I believe I may have Cassandra's Curse. I always speak the truth and yet nobody believes me, even if I have evidence people seem to be in disbelief. Does anyone know of anything I can do to perhaps break this curse or at least make others understand? Thanks.
Just ignore it and reject the thought of that curse out of your mind. Unless a God tried to get you to have sex with then, it's just a delusion. You're going to be ok. And if it isn't, just remember that everything always works itself out one way or another.
Try taking a salt bath to start with, the cleanse yourself. Then a protect and banishing spell. I don't know your practicing beliefs or style but, I'd recommend performing a banishing spell first to break it (do so in your path's way) and the a protection spell (also in your path's way) to keep yourself safe.
I would also consider trying to figure out how this occurred. Curses don't just pop out of thin air for no reason. This could be a karmatic shift for something you did or energies you put out in the world or a maliciousness directed at you. Consider it and learn from it.
I don't believe it's my place to believe or disbelieve you. It's kind of silly a few people don't believe you on this thread based on their own beliefs, when what matters here is your belief and the fact that you asked for advise, not judgement.