What should I do if I know I didn't do anything wrong but I've still been accused of consent violations?
Was it because of misunderstandings?
No, it's her fault, she's lying because I refused to go out with her two nights ago.
It is bad to be accused of something you didn't do. It would be good for you to let people know that she is accusing you of something you didn't do even if some people won't believe you.
She's only doing this because she wants attention.
If she's doing this to you, then you need to speak with her and try to make things better-- that, or hire a lawyer. What she's doing is extremely illegal and you need to let her know that she's doing something wrong.