[Kate*]

Accidents happen, and that's what this was. The best thing you can do is email your prof explaining the situation and attach the page as proof that you did in fact do one. I seriously doubt you'll get kicked out for this. The absolute worst case scenario would either be a zero for the paper if she's super strict, or significant points off since the page is late. As long as you make it obvious to her that you didn't plagiarize on purpose, and she already has proof from your last paper that you know how to do things correctly, it should be fine.