My mum threw out my foundation, what to do?

My mum threw out my foundation by accident when she was cleaning up. I am so paranoid about the way my skin looks. I look awful. I don't cake my face with make up. But I use it to even out my colour only when I go to high school, and to make my skin look nicer. I have such low confidence, I don't wear it at home, just outside, and no one has seen me without it. How can I make my skin look better for tomorrow? :(