Professor thinks someone else wrote my paper?

I think you should wait for the grade of that essay. I think that one of the mistakes a lot of teachers make is not believing their students....there's just this black cloud in many teachers that think that most of the students are lost and that all of them lie..but this is not true. You should not have to repeat to the teacher the same thing that she already knows...you already tried to talk with her, the only thing left to do is wait. Unless you think you can be able to take your mom or dad to talk to the teacher...this would sound way much more believable (and in your case it is truth, so you should have no problem). Good luck! I hope everything turns out okay. God bless you