D: *hugs chelsea*
She seems like a horrible friend though...
Well Chelsea, I don't think anyone will misunderstand anything about you with one incident. Your friends will understand you. Those who do not understand and misunderstand you because of this one incident have never thought well of you or trusted you in the first place. There's no need to bother about them. However, those who believed in you will come to realize that that girl has some problem in her character.
Just like if you have always been early, when you're late, no one will blame you. When you have always done your homework, when you didn't, no one will apprehend you. SO Even if you don't give a reason, no one will think wrongly of you, unless they weren't on your side in the first place.