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.