Super afraid that my teacher will find out that i let a girl cheat off of me?

So we had this dumb fake vegetable garden project for my science class. Well I did all the work and the girl next to me didn't get it. I tried explaining, but she still didn't get it, so I just let her copy me.When we went to go turn them in, she looked at mine first, told me it was in the wrong order, and told me to go staple it. So after me and the girl stapled it, we turned it in and she looked at the girl who copied mine and said "Did you copy someones? I have seen these numbers before?" And she said no, but now i'm extremely paranoid. Our teacher will be grading it over winter break, and I'm sooo scared she knows she copied me. I'm a super good student, and I am so afraid i could get suspended or get an after school detention for what I did. If she figures it out, what should I say??